The document discusses the phenomenon of dispersion of white light and the visible light spectrum. It explains that when white light passes through a transparent medium, it splits into its constituent colors from red to violet due to dispersion. The range of the visible light spectrum is from 0.4 to 0.7 microns. It also defines primary colors as red, blue and green which when mixed together produce white light, and secondary colors as cyan, magenta and yellow which are obtained by mixing two primary colors. Complementary colors are pairs of primary and secondary colors that combine to make white light.
The document discusses the properties of visible light and color, explaining that visible light is a narrow range of frequencies and wavelengths perceived by the human eye as different colors, with higher frequencies appearing violet/blue and lower frequencies appearing red. It describes how the primary colors of light - red, green and blue - can be combined to create other colors, and how the color an object appears depends on which colors of light it reflects or transmits.
This document discusses the properties of visible light and color. It explains that visible light is the narrow range of wavelengths within the electromagnetic spectrum that can be seen by the human eye. Differences in wavelengths are perceived as different colors. The primary colors of light are red, green, and blue, and different combinations of these colors produce other hues. The color an object appears depends on which wavelengths of light it reflects or transmits.
This document discusses the fundamentals of color, including:
1. Color is perceived when light wavelengths are absorbed, reflected, refracted, scattered, or diffracted by matter. It is a psychological response to a physical stimulus.
2. Color mixing can be additive, involving light sources, or subtractive, involving dyes and pigments. Subtractive color mixing uses cyan, magenta, and yellow primaries.
3. Color perception involves light stimulation of red, green, and blue cone receptors in the eye, which signals are interpreted by the brain.
Basics of offset printing and other printing techniquesSappiHouston
The document provides an overview of different printing methods including offset printing and gravure. It discusses offset printing principles such as how printed and unprinted areas are achieved using the offset plate and fountain solution. Sheet-fed offset and heat-set web offset printing are described. Other conventional printing methods like gravure and flexography are also covered. The document concludes with a high-level summary of the various printing techniques.
- Color is a physiological response caused by light wavelengths entering the retina. The visible light spectrum ranges from 700-400nm and is commonly known as ROYGBIV.
- Objects appear colored due to selective absorption and reflection/transmission of light wavelengths. Pigments in objects absorb certain wavelengths while reflecting others.
- In additive color mixing, combining red, green and blue light produces white and other secondary colors. In subtractive color mixing, combining pigments absorbs colors and removes them from reflected light.
The eye accommodates by increasing its lens power to 59.6 diopters.
2. The lens power is 59.6 diopters & the focal
length is:
f = 0.25 m
3. The near point for a normal eye is 0.25 m.
4. Presbyopia occurs when the eye loses its ability
to accommodate for close objects. The near point
increases beyond 0.25 m.
So in summary, the eye changes its focal length to focus on objects at different distances by changing its lens power through accommodation.
Aashish Jain ,B.Sc-ID+ 2 Year Residential & Commercial Design Diplomadezyneecole
This Project has been Developed by the Student of Dezyne E'cole College Doing His Interior Design Studies Bachelor Degree Programme + 2Yr Residential & Commercial Design Diploma Programme www.dezyneecole.com
The document discusses important color theory terms that designers must understand, including CMYK and RGB color models, dots per inch (DPI) versus pixels per inch (PPI), typography concepts like kerning, ICC color profiles, local color, gamut, color context, complementary colors that are directly opposite each other on the color wheel, and supplementary colors that are between two primary colors. It provides brief definitions and explanations of each term to help designers properly work with and understand color.
The document discusses the properties of visible light and color, explaining that visible light is a narrow range of frequencies and wavelengths perceived by the human eye as different colors, with higher frequencies appearing violet/blue and lower frequencies appearing red. It describes how the primary colors of light - red, green and blue - can be combined to create other colors, and how the color an object appears depends on which colors of light it reflects or transmits.
This document discusses the properties of visible light and color. It explains that visible light is the narrow range of wavelengths within the electromagnetic spectrum that can be seen by the human eye. Differences in wavelengths are perceived as different colors. The primary colors of light are red, green, and blue, and different combinations of these colors produce other hues. The color an object appears depends on which wavelengths of light it reflects or transmits.
This document discusses the fundamentals of color, including:
1. Color is perceived when light wavelengths are absorbed, reflected, refracted, scattered, or diffracted by matter. It is a psychological response to a physical stimulus.
2. Color mixing can be additive, involving light sources, or subtractive, involving dyes and pigments. Subtractive color mixing uses cyan, magenta, and yellow primaries.
3. Color perception involves light stimulation of red, green, and blue cone receptors in the eye, which signals are interpreted by the brain.
Basics of offset printing and other printing techniquesSappiHouston
The document provides an overview of different printing methods including offset printing and gravure. It discusses offset printing principles such as how printed and unprinted areas are achieved using the offset plate and fountain solution. Sheet-fed offset and heat-set web offset printing are described. Other conventional printing methods like gravure and flexography are also covered. The document concludes with a high-level summary of the various printing techniques.
- Color is a physiological response caused by light wavelengths entering the retina. The visible light spectrum ranges from 700-400nm and is commonly known as ROYGBIV.
- Objects appear colored due to selective absorption and reflection/transmission of light wavelengths. Pigments in objects absorb certain wavelengths while reflecting others.
- In additive color mixing, combining red, green and blue light produces white and other secondary colors. In subtractive color mixing, combining pigments absorbs colors and removes them from reflected light.
The eye accommodates by increasing its lens power to 59.6 diopters.
2. The lens power is 59.6 diopters & the focal
length is:
f = 0.25 m
3. The near point for a normal eye is 0.25 m.
4. Presbyopia occurs when the eye loses its ability
to accommodate for close objects. The near point
increases beyond 0.25 m.
So in summary, the eye changes its focal length to focus on objects at different distances by changing its lens power through accommodation.
Aashish Jain ,B.Sc-ID+ 2 Year Residential & Commercial Design Diplomadezyneecole
This Project has been Developed by the Student of Dezyne E'cole College Doing His Interior Design Studies Bachelor Degree Programme + 2Yr Residential & Commercial Design Diploma Programme www.dezyneecole.com
The document discusses important color theory terms that designers must understand, including CMYK and RGB color models, dots per inch (DPI) versus pixels per inch (PPI), typography concepts like kerning, ICC color profiles, local color, gamut, color context, complementary colors that are directly opposite each other on the color wheel, and supplementary colors that are between two primary colors. It provides brief definitions and explanations of each term to help designers properly work with and understand color.
This document summarizes the development of a lighting technology startup. It began investigating high-brightness LED linear bulbs but pivoted to focus on color-tunable lighting after determining commercial customers prioritized dimming over brightness. The startup then explored museum and horticulture lighting markets where color control is important, with the potential to target the $500 million museum PAR38 bulb market with an integrated, color-tunable solution.
The document discusses various components of multimedia including audio, video, animation and graphics. It then covers topics such as typography including font types, font size, spacing and contrast. Next, it discusses color schemes, color terms and the color wheel. Other topics covered include text layout principles, vector and bitmapped graphics, screen and image resolution, image depth, color models, file size and image compression techniques. Finally, common image file formats are presented.
Digital images can be summarized in 3 sentences or less:
Digital images have spatial resolution determined by the number of pixels, brightness resolution represented by the number of gray levels, and color resolution defined by the number of color samples. The human vision system perceives light and color based on the wavelength and can adapt to large intensity ranges through brightness adaptation. Objective image quality is measured by metrics like peak signal-to-noise ratio while subjective quality depends on human perception and visual illusions.
This white paper discusses converting traditional lighting to LED lighting in commercial buildings. It notes that lighting accounts for over 70% of electricity used in commercial buildings in the US. Retrofitting with LEDs can reduce energy consumption by 50-80% while maintaining or improving lighting quality. LEDs offer significant savings in energy, maintenance, and have a longer lifespan than traditional lighting. The paper provides examples of suitable indoor and outdoor applications for LED lighting and notes the benefits of LEDs such as high quality light, low heat emission, and quick restart time.
1) Light refracts when passing from one medium to another of different density, bending towards the normal. The refractive index is a ratio of light speeds and relates the angle of incidence to refraction.
2) Total internal reflection occurs at a critical angle when light passes from a dense to less dense medium.
3) A prism disperses white light into a spectrum due to different refractive indices for each color, with violet refracting most and red least.
Stonco is proud to unveil our brand new LED site lighting package featuring Philips LifeLED Technology. Our package includes a collection of architectural area lights, wall mounted sconces and ceiling mounted parking garage and canopy luminaires.
This document provides an overview of bleaching chemical pulps. It defines bleaching as the chemical treatment of pulp to increase brightness, cleanliness, and brightness stability while preserving fiber strength. Bleaching removes residual lignin using oxidizing agents like chlorine, chlorine dioxide, and oxygen. Compared to pulping, bleaching is more selective and removes less lignin but produces problematic effluents. The document discusses important pulp properties affected by bleaching like brightness, viscosity, and fiber strength. It also covers bleaching chemicals, how their oxidizing power and efficiency can be measured, and their environmental impacts.
Big Ed™ 3700 Photoluminescent Flashlight
Same as the 3700 Flashlight but outfitted with a lens ring that emits a bright glow in the dark.
The new generation photoluminescent material in the plastic absorbs the energy from any
light source - fluorescent lights, the sun, or even the flashlight\'s own beam. No more
fumbling in the dark for your flashlight. The Big Ed 3700PL is powered by 4 C alkaline cells.
The document describes an iterative algorithm called Eradicator for removing motion blur from photographs without prior knowledge of the point spread function or noise characteristics. The algorithm works by iteratively estimating the original sharp image and point spread function that produced the blurred image. It begins with an initial guess for the sharp image and estimates the point spread function by convolving it with the blurred image. A correction factor is then computed using the estimated point spread function and blurred image to update the estimated sharp image. This process is repeated over multiple iterations to refine the estimates until the sharp image converges. The algorithm is shown to outperform iterative Wiener filtering in terms of mean squared error and signal-to-noise ratio on sample images.
Sceince of colour and Shade Selection by Dr. Vaibhav BudakotiVAIBHAVBUDAKOTI1
The modern dentist must be trained to detect differences in color and shades in individual teeth, select a shade that reflects the color and exact shade, transmit this information to a dental technician, and be able to deliver an esthetic restoration.
This document discusses various types of pigments used in art, including their chemical compositions and origins. It provides lists of pigments categorized by color, including whites, blacks, yellows, oranges, and reds. For each pigment, the document mentions the chemical element or compound, whether it is natural or synthetic, and sometimes the historical or geographical context of its use. The document serves as a reference for artists on the pigments available from different time periods and cultures.
This document discusses color and optical effects in dentistry. It begins by explaining the nature of light and how the human eye perceives color. It then discusses how the properties of materials, such as opacity, translucency and roughness, determine how light interacts with objects and affects their appearance. The document also covers color perception in terms of hue, value and chroma. It describes color matching guides and factors that can influence color matching, such as lighting conditions, the observer, and fluorescence. The goal is to help dental professionals achieve optimal esthetic results when matching tooth colors.
Physical processes employed in artificial lighting sources include incandescence, luminescence, fluorescence, and phosphorescence. Incandescence uses heat to produce light from materials like tungsten filaments. Luminescence produces light through chemical or electrical excitation of gases and vapors. Fluorescence absorbs light at one wavelength and re-emits it at another, making UV light visible. Phosphorescence stores light energy and releases it later as glow. Efficient lighting combines luminescence and fluorescence.
The document discusses color image processing and color models. It describes how color is perceived by the human visual system through rods and cones in the retina. Various color models are examined, including RGB, CMY, HSV, YIQ, and YUV. Color models transform between different representations of color, such as representing a color by its hue, saturation, and intensity rather than red, green, and blue values.
The physics of color - Rey San Andrew Rimando Rey Rimando
The document provides information about color theory, including:
1) It defines color as the visual perceptual property that is created by the interaction of light with the eyes' light receptors. Color is associated with objects based on their light absorption, reflection, or emission spectra.
2) It discusses Newton's discovery that visible light is made up of different wavelengths, which are dispersed by a prism into the visible light spectrum from red to violet. Each color corresponds to a different wavelength.
3) It explains color vision in the eye, which uses three types of color-sensitive cone cells and one type of rod cell sensitive to brightness but not color.
4) It describes the primary, secondary, tert
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1) Light travels in straight lines and much faster than sound.
2) We see objects because they reflect light into our eyes, and shadows are formed when light is blocked.
3) Reflection, refraction, and the splitting of white light into colors are described. Filters can be used to block certain colors of light.
Here is a labeled diagram of the ear:
Outer Ear
- This part "picks up" the vibrations
Ear Canal
- This part "channels" the sound towards the ear drum
Ear Drum
- This part is vibrated by the sound waves
Hammer
- One of the bones vibrated by the eardrum
Anvil
- One of the bones vibrated by the eardrum
Stirrup
- One of the bones vibrated by the eardrum
Cochlea
- This part of the ear contains many small hairs with turn vibrations into an electrical signal
Semicircular Canals
- This
Here is a labeled diagram of the ear:
Outer Ear
- This part "picks up" the vibrations
Ear Canal
- This part "channels" the sound towards the ear drum
Ear Drum
- This part is vibrated by the sound waves
Hammer
- One of the bones vibrated by the eardrum
Anvil
- One of the bones vibrated by the eardrum
Stirrup
- One of the bones vibrated by the eardrum
Cochlea
- This part of the ear contains many small hairs with turn vibrations into an electrical signal
Semicircular Canals
- This
This document discusses the nature of light as an electromagnetic wave, how light interacts with different materials as either luminous or illuminated bodies, the characteristics of light like wavelength and speed, and concepts such as luminous flux, illuminance, luminous intensity, the additive and subtractive properties of light, and how dyes and pigments produce color. It also covers topics ranging from the primary and complementary colors of light and pigments to polarized light and thin film interference.
The document discusses key concepts in color theory, including:
- Color is influenced by physics, chemistry, physiology, and psychology. It immediately attracts attention and can influence emotions.
- There are two major color systems - additive RGB colors created by light and subtractive RYB colors created when light reflects off surfaces.
- Color interaction and effects depend on surrounding colors, lighting, and cultural associations according to principles of color theory.
The document discusses key concepts in color theory, including:
- Color is affected by physics (wavelength), chemistry (pigments), physiology (eye perception), and psychology (emotions).
- There are two main color systems - additive RGB used in screens and subtractive CMYK used in printing.
- Color interaction and simultaneous contrast influence how colors are perceived based on their surroundings.
- The color wheel is used to define hues, primary/secondary/tertiary colors, warm/cool temperatures, and tints/tones/shades based on lightness and darkness.
This document summarizes the development of a lighting technology startup. It began investigating high-brightness LED linear bulbs but pivoted to focus on color-tunable lighting after determining commercial customers prioritized dimming over brightness. The startup then explored museum and horticulture lighting markets where color control is important, with the potential to target the $500 million museum PAR38 bulb market with an integrated, color-tunable solution.
The document discusses various components of multimedia including audio, video, animation and graphics. It then covers topics such as typography including font types, font size, spacing and contrast. Next, it discusses color schemes, color terms and the color wheel. Other topics covered include text layout principles, vector and bitmapped graphics, screen and image resolution, image depth, color models, file size and image compression techniques. Finally, common image file formats are presented.
Digital images can be summarized in 3 sentences or less:
Digital images have spatial resolution determined by the number of pixels, brightness resolution represented by the number of gray levels, and color resolution defined by the number of color samples. The human vision system perceives light and color based on the wavelength and can adapt to large intensity ranges through brightness adaptation. Objective image quality is measured by metrics like peak signal-to-noise ratio while subjective quality depends on human perception and visual illusions.
This white paper discusses converting traditional lighting to LED lighting in commercial buildings. It notes that lighting accounts for over 70% of electricity used in commercial buildings in the US. Retrofitting with LEDs can reduce energy consumption by 50-80% while maintaining or improving lighting quality. LEDs offer significant savings in energy, maintenance, and have a longer lifespan than traditional lighting. The paper provides examples of suitable indoor and outdoor applications for LED lighting and notes the benefits of LEDs such as high quality light, low heat emission, and quick restart time.
1) Light refracts when passing from one medium to another of different density, bending towards the normal. The refractive index is a ratio of light speeds and relates the angle of incidence to refraction.
2) Total internal reflection occurs at a critical angle when light passes from a dense to less dense medium.
3) A prism disperses white light into a spectrum due to different refractive indices for each color, with violet refracting most and red least.
Stonco is proud to unveil our brand new LED site lighting package featuring Philips LifeLED Technology. Our package includes a collection of architectural area lights, wall mounted sconces and ceiling mounted parking garage and canopy luminaires.
This document provides an overview of bleaching chemical pulps. It defines bleaching as the chemical treatment of pulp to increase brightness, cleanliness, and brightness stability while preserving fiber strength. Bleaching removes residual lignin using oxidizing agents like chlorine, chlorine dioxide, and oxygen. Compared to pulping, bleaching is more selective and removes less lignin but produces problematic effluents. The document discusses important pulp properties affected by bleaching like brightness, viscosity, and fiber strength. It also covers bleaching chemicals, how their oxidizing power and efficiency can be measured, and their environmental impacts.
Big Ed™ 3700 Photoluminescent Flashlight
Same as the 3700 Flashlight but outfitted with a lens ring that emits a bright glow in the dark.
The new generation photoluminescent material in the plastic absorbs the energy from any
light source - fluorescent lights, the sun, or even the flashlight\'s own beam. No more
fumbling in the dark for your flashlight. The Big Ed 3700PL is powered by 4 C alkaline cells.
The document describes an iterative algorithm called Eradicator for removing motion blur from photographs without prior knowledge of the point spread function or noise characteristics. The algorithm works by iteratively estimating the original sharp image and point spread function that produced the blurred image. It begins with an initial guess for the sharp image and estimates the point spread function by convolving it with the blurred image. A correction factor is then computed using the estimated point spread function and blurred image to update the estimated sharp image. This process is repeated over multiple iterations to refine the estimates until the sharp image converges. The algorithm is shown to outperform iterative Wiener filtering in terms of mean squared error and signal-to-noise ratio on sample images.
Sceince of colour and Shade Selection by Dr. Vaibhav BudakotiVAIBHAVBUDAKOTI1
The modern dentist must be trained to detect differences in color and shades in individual teeth, select a shade that reflects the color and exact shade, transmit this information to a dental technician, and be able to deliver an esthetic restoration.
This document discusses various types of pigments used in art, including their chemical compositions and origins. It provides lists of pigments categorized by color, including whites, blacks, yellows, oranges, and reds. For each pigment, the document mentions the chemical element or compound, whether it is natural or synthetic, and sometimes the historical or geographical context of its use. The document serves as a reference for artists on the pigments available from different time periods and cultures.
This document discusses color and optical effects in dentistry. It begins by explaining the nature of light and how the human eye perceives color. It then discusses how the properties of materials, such as opacity, translucency and roughness, determine how light interacts with objects and affects their appearance. The document also covers color perception in terms of hue, value and chroma. It describes color matching guides and factors that can influence color matching, such as lighting conditions, the observer, and fluorescence. The goal is to help dental professionals achieve optimal esthetic results when matching tooth colors.
Physical processes employed in artificial lighting sources include incandescence, luminescence, fluorescence, and phosphorescence. Incandescence uses heat to produce light from materials like tungsten filaments. Luminescence produces light through chemical or electrical excitation of gases and vapors. Fluorescence absorbs light at one wavelength and re-emits it at another, making UV light visible. Phosphorescence stores light energy and releases it later as glow. Efficient lighting combines luminescence and fluorescence.
The document discusses color image processing and color models. It describes how color is perceived by the human visual system through rods and cones in the retina. Various color models are examined, including RGB, CMY, HSV, YIQ, and YUV. Color models transform between different representations of color, such as representing a color by its hue, saturation, and intensity rather than red, green, and blue values.
The physics of color - Rey San Andrew Rimando Rey Rimando
The document provides information about color theory, including:
1) It defines color as the visual perceptual property that is created by the interaction of light with the eyes' light receptors. Color is associated with objects based on their light absorption, reflection, or emission spectra.
2) It discusses Newton's discovery that visible light is made up of different wavelengths, which are dispersed by a prism into the visible light spectrum from red to violet. Each color corresponds to a different wavelength.
3) It explains color vision in the eye, which uses three types of color-sensitive cone cells and one type of rod cell sensitive to brightness but not color.
4) It describes the primary, secondary, tert
this is the best ppt ever seen>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
1) Light travels in straight lines and much faster than sound.
2) We see objects because they reflect light into our eyes, and shadows are formed when light is blocked.
3) Reflection, refraction, and the splitting of white light into colors are described. Filters can be used to block certain colors of light.
Here is a labeled diagram of the ear:
Outer Ear
- This part "picks up" the vibrations
Ear Canal
- This part "channels" the sound towards the ear drum
Ear Drum
- This part is vibrated by the sound waves
Hammer
- One of the bones vibrated by the eardrum
Anvil
- One of the bones vibrated by the eardrum
Stirrup
- One of the bones vibrated by the eardrum
Cochlea
- This part of the ear contains many small hairs with turn vibrations into an electrical signal
Semicircular Canals
- This
Here is a labeled diagram of the ear:
Outer Ear
- This part "picks up" the vibrations
Ear Canal
- This part "channels" the sound towards the ear drum
Ear Drum
- This part is vibrated by the sound waves
Hammer
- One of the bones vibrated by the eardrum
Anvil
- One of the bones vibrated by the eardrum
Stirrup
- One of the bones vibrated by the eardrum
Cochlea
- This part of the ear contains many small hairs with turn vibrations into an electrical signal
Semicircular Canals
- This
This document discusses the nature of light as an electromagnetic wave, how light interacts with different materials as either luminous or illuminated bodies, the characteristics of light like wavelength and speed, and concepts such as luminous flux, illuminance, luminous intensity, the additive and subtractive properties of light, and how dyes and pigments produce color. It also covers topics ranging from the primary and complementary colors of light and pigments to polarized light and thin film interference.
The document discusses key concepts in color theory, including:
- Color is influenced by physics, chemistry, physiology, and psychology. It immediately attracts attention and can influence emotions.
- There are two major color systems - additive RGB colors created by light and subtractive RYB colors created when light reflects off surfaces.
- Color interaction and effects depend on surrounding colors, lighting, and cultural associations according to principles of color theory.
The document discusses key concepts in color theory, including:
- Color is affected by physics (wavelength), chemistry (pigments), physiology (eye perception), and psychology (emotions).
- There are two main color systems - additive RGB used in screens and subtractive CMYK used in printing.
- Color interaction and simultaneous contrast influence how colors are perceived based on their surroundings.
- The color wheel is used to define hues, primary/secondary/tertiary colors, warm/cool temperatures, and tints/tones/shades based on lightness and darkness.
The document discusses color theory and the physics and perception of color. It explains that sunlight is colorless and appears white, but contains all visible wavelengths which are separated by prisms into the colors of the visible spectrum. The eye perceives color when objects absorb all wavelengths except the color that is reflected. The additive and subtractive color models are described, with the additive model using red, green and blue light as primary colors to make white, and the subtractive model using cyan, magenta and yellow pigments to make black. The color wheel is also depicted, showing primary, secondary and tertiary colors as well as complementary color pairs.
Color image processing involves two main areas: full-color processing where images are acquired with a color sensor, and pseudo-color processing where monochrome intensities are assigned colors. The document then discusses color fundamentals including the visible light spectrum, how humans perceive color, primary/secondary colors, and color models like RGB, CMY, and HSI. It explains how to convert between RGB and HSI color spaces, with HSI being more intuitive for describing colors to humans. Pseudo-color processing is described as mapping gray levels to colors to enhance image details.
The document discusses color theory, including the science of color, primary/secondary/tertiary colors, color systems like RGB and CMYK, color schemes such as monochromatic and complementary, creating custom color schemes, properties and effects of color, color psychology, and the social and cultural symbolism associated with different colors. It provides examples and explanations of these various aspects of color theory.
Color can be described through hue, saturation, and brightness. There are two main color models - additive RGB used in screens and subtractive CMYK used in printing. The HSV color space also describes colors through hue, saturation, and value. Precise color is specified through dominant wavelength, excitation purity, and brightness based on the electromagnetic spectrum of visible light frequencies between 400-700nm. Video color models are derived from analog TV methods and separate luminance from color. The eye sees yellow-green best and blue worst, and the CIE color space provides a three-dimensional representation of color perception.
The document defines key color terminology including hue, value, saturation, and luminance. It explains that hue refers to the name of a color, value refers to the lightness or darkness of a hue, and saturation refers to a color's brightness. It also defines additive and subtractive color theories. Additive theory uses projected red, green, and blue lights that combine to create other colors and white light. Subtractive theory uses dyes and pigments that absorb some light wavelengths and reflect others to create colors.
Colour can be perceived through sight when light interacts with objects. Sir Isaac Newton discovered that white light is made up of the visible light spectrum, including red, orange, yellow, green, blue, indigo, and violet colors. Colour theory explores how colors are created and mixed through additive primary colors of red, green and blue or subtractive primary colors of magenta, cyan and yellow. A document on color theory discusses qualities like hue, value, saturation and temperature, and how colors relate and are organized on a color wheel and color cube.
Colors have different meanings across cultures and contexts. Red symbolizes love in the West but mourning in Thailand. Blue represents spirituality in Iran but sadness in the West. Understanding the cultural symbolism of colors can provide insight into how they may be perceived differently worldwide.
1. Colour originates from light, with white light containing all colours of the visible spectrum.
2. The eye perceives colour when objects absorb some wavelengths of light and reflect others. For example, a red apple absorbs all colours except red light, which it reflects to the eye.
3. There are two main colour systems - additive for light-based media like monitors, which uses red, green and blue primary colours, and subtractive for pigment-based media like print, which uses cyan, magenta, yellow and black primary colours.
Colour originates from light and different colours have different wavelengths. The eye perceives colour when it receives reflected light from object surfaces. There are two main colour systems - the additive RGB system used in screens mixes red, green and blue light, while the subtractive CMYK system used in printing mixes cyan, magenta, yellow and black pigments. The colour wheel is used to visualize hue, saturation, tints, shades and complementary colours. Colour schemes like monochromatic, analogous and complementary create visual harmony. Colour perception can be influenced by surrounding colours.
Here are the points one should know while designing anything using colours. Terms like Hue, Saturation, Brightness, RGB, CMYK, Color Wheel are well explained here. One can also know about palletes and colour models. Please also read my presentation on Image file formats to know almost all basics related to designing on computers.
The document discusses colour theory, including the origins and perception of colour, light decomposition, and how the colour of objects is determined by light absorption and reflection. It covers hue, saturation, value, additive and subtractive colour mixing, primary and secondary colours, complementary colours, and limitations of three-colour mixing systems. Optical colour mixing through pointillism and layering of transparent colours is also summarized.
There are two types of primary colors - additive and subtractive. Additive primary colors are red, green, and blue light, which when combined produce white light. Subtractive primary colors are cyan, magenta, and yellow pigments, which when combined produce black. The color we see is determined by which wavelengths of light are reflected off an object's surface, while the rest are absorbed. Computer screens use red, green, and blue light to display colors by adjusting the intensity of each color.
1. PANCHAYAT UNION MIDDLE SCHOOL, VISWANATHAM
SIVAKASI UNION,
VIRUDHUNAGAR DISTRICT,
TAMILNADU STATE, INDIA-626124.
CELL NO 97510-45246. Exit
2. Dispersion
Dispersion of White light
Colours
Colour Filters Home
Mixing Colour or Spectral Colours
Colour Blindness – An Activity
Mixing of Colours – An Activity
Newtons’ Colour Disc PHYSICS
3. The phenomenon by which a ray of light splits into its
constituent colours when 00is passed through a
it
transparent medium is known as dispersion.
Red
Orange Range of
Yellow Visible
Green Spectrum
Blue 0.4 microns to
Indigo
0.7 microns
Violet
Spectrum is the band of colours obtained due to
the dispersion of Light. Rainbow
6. Pigment is an optically active substance which may be synthetic or of
Mineral animal or vegetable origin.
7. Pigment is sensation produced in the brain due to the excitation of retina, by
Colour is a an optically active substance which may be synthetic or of
Mineral animal or vegetable origin.
electromagnetic waves.
The range of wavelength of these waves is 4000Å to 8000Å
Angstrom (Å) : It is the unit used to measure wavelength of electromagnetic
radiation. 1 Å =10-10 m =10-8 cm
8. Red
Orange
Yellow
Green
Blue
Indigo
Violet
Primary Colours
Red Blue Green
9. The Primary colours are the
white light.
Colours which when mixed
in equal proportions
give white light.
ctor
Projector
r
cto
je
oje
Pro
Pr
10. The colours obtained by the mixing two primary colours are called
Secondary Colors
Secondary Colours
Cyan Magenta Yellow
11. Pro
je ctor
Red + Green = Yellow
Projector
Yellow
r
cto
Pr oje
12. Red + Blue = Magenta Magenta
ctor
Projector
r
cto
je
oje
Pro
Pr
13. Pro
je ctor
Green + Blue = Cyan
Projector
r
cto
Pr oje
Cyan
14. The Secondary colours are obtained by projecting light of one colour on the other
and the rocess is known as colour mixing by addition. The colurs thus obtained are
called additive colours
Cyan Magenta
Yellow
15. Complementary Colours can be defined as pair of colours one primary and other
secondary colour, which on mixing forms white light.
Secondary Colours are known as subtractive primaries as they are obtained by
subtracting one of the primary colours from white light.
White
White White
16. Yellow + Green = White White
ctor
Projector
r
cto
je
oje
Pro
Pr
17. Pro
je ctor
Green + Cyan = White
Projector
r
cto
White
Pr oje
18. Pro
je ctor
Red + Cyan = White
Projector
White
r
cto
Pr oje
19. Colour Triangle
Primary Colours Secondary Colours
Red Magenta
Green Yellow
Blue Cyan
Cyan
The order of the colours is such that the sum of any two primary colours at the
Corners gives the secondary colors between them.
The sum of the primary colour on the vertex and the secondary colour on the side
opposite to the vertex produces white light.
20.
21.
22. The Rod shaped cells are sensitive to brightness of light. The Cone shaped cells
orRetina : The retina, the colours.of the human eye, Consists ofsensitive andnumber
cones are sensitive to screen There are red sensitive, blue a very large
green sensitive cones. Colourare rod shaped cells and cone shaped cells.cones
of light sensitive cells. They blind people have less number of particular
than people with normal vision. Hence they get colour confused.
Retina Rod shaped Cells
Cone shaped Cells
23. If you see the No 12. your vision is normal else not.
24. Look at this picture and click on the number you see.
a) 21 b) 24 c ) 74 d) No number