Light and sound by María and Andrea
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Light is a form of energy that allows us to see objects by reflecting off of them. Light sources can be natural like the sun or artificial like light bulbs. Light travels very quickly in straight lines in all directions from the source. It can pass through transparent materials, only partially pass through translucent materials, and not pass through opaque materials. Reflection and refraction change the direction of light rays when they encounter different materials or change speed. Lenses and optical devices like glasses use refraction to magnify or redirect light for applications such as vision correction and microscopes.
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1) Light travels much faster than sound, so we see lightning before hearing thunder. When a starting pistol fires, we see the smoke before hearing the bang.
2) Light travels extremely fast at around 300,000 kilometers per second, and can circle the Earth 8 times in one second.
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Light is a form of energy that travels as waves, with its wavelength determining properties like color. Matter interacts with light through reflection, refraction, and absorption. Transparent materials like glass transmit light, translucent materials like frosted glass scatter but transmit some light, and opaque materials like wood reflect or absorb light and transmit none. The color we see of an object depends on which wavelengths of light it reflects or absorbs.
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Light has properties of brightness, color, and visibility. Brightness depends on the intensity of light from its source and decreases with greater distance from the source. Color is a property of light, with white light containing all colors that can be separated by a prism into the colors of the visible spectrum. For an object to be visible, it must emit or reflect light. The document then discusses various interactions of light, including reflection, refraction, absorption, and how light interacts differently with transparent, translucent, and opaque materials.
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Light is a form of energy that travels in waves and can be reflected, refracted, or absorbed. It is made up of photons that are emitted by atoms. Light determines the color we see in objects based on which wavelengths of light are reflected or absorbed. The sky appears blue due to scattering of blue light by air molecules, while the color of objects depends on which wavelengths of light they reflect or absorb.
Physics 7 - Light (characteristics, properties, kinds and types of light)
The document discusses the electromagnetic spectrum and visible light. It begins by discussing dispersion and rainbow formation. It then covers the characteristics of visible light, including that it is made up of different wavelengths/frequencies that correspond to colors. When white light is passed through a prism, it is dispersed into the colors of the visible light spectrum. The document also discusses color perception in objects and mixing of light colors. It explores sources of light, including natural and artificial sources. Finally, it discusses color blindness and the different types, including dichromacy and anomalous trichromacy.
Light introduction (3)
The document provides information about light and its characteristics. It discusses that light is a form of electromagnetic radiation that can be perceived by the human eye. It travels in waves and its wavelength determines properties like color. The document then describes characteristics of light such as its speed changing between mediums while frequency remains the same. It also discusses terminology related to light like luminance, luminaires, and illuminance. The properties of light covered include reflection, refraction, dispersion, interference and polarization.
Unit 5. light
Light is a type of electromagnetic radiation that travels in waves. It can come from natural or artificial sources and travels in straight lines at a speed of about 300,000 km/s in a vacuum. Light has properties of propagation in straight lines, reflection off surfaces, and refraction when passing between different mediums. Shadows are formed when an opaque object blocks light, and solar and lunar eclipses occur due to the alignment of the sun, moon, and earth. The human eye can see visible light, but defects like myopia, hypermetropia, and astigmatism affect vision.
Ch.12.less.12.how does light travel and interact with matter
This document discusses how light travels and interacts with matter. It explains that light is made up of electric and magnetic waves, and discusses the differences between transparent, translucent, and opaque materials. It also covers how light travels in a straight line at very high speeds, including through a vacuum. Additional topics covered include shadows, reflection, refraction, the bending of light, prisms splitting white light into a spectrum, and how we see the colors of objects based on which wavelengths of light they reflect.
Light and heat
Isaac Newton was an English scientist born in 1642 who discovered gravity and showed that white light is composed of the visible color spectrum. He accidentally discovered gravity when an apple fell on his head. Light has characteristics such as traveling very fast, reflecting or refracting when encountering different materials, and traveling in straight lines. Materials can be transparent, translucent, or opaque depending on how much light they allow to pass through. Reflection occurs when light bounces off a surface, and refraction is when light changes direction moving between substances like water.
COLOR_OF_LIGHTS.ppt
Electromagnetic waves interact with materials in several ways that determine the color perceived. Color arises from emission, reflection, transmission, interference, dispersion, and scattering of light waves interacting with objects. The primary colors of light are red, green and blue, which combine to make white light. The primary colors of pigment are cyan, yellow and magenta, which combine to make black. Reflection, refraction, polarization, and interference cause the wide variety of colors observed from different materials due to the interaction of light waves.
EM-Waves.pptx
Electromagnetic waves are a group of mostly invisible energy waves that can travel through empty space. They include visible light, infrared, microwaves, and x-rays. Electromagnetic waves interact with materials through absorption, reflection, transmission, and refraction. Materials are chosen for applications based on their thermal and electrical conductivity properties.
U12 Light Sound
The document discusses key concepts about light and sound including:
1. Light and sound travel as waves and have properties of wavelength, frequency, and speed. Light sources include the sun, stars, and artificial sources while sound is produced by vibration.
2. Light can be reflected, refracted, and absorbed differently by transparent, translucent, and opaque materials. It travels in straight lines and causes shadows. Reflection and refraction follow predictable angle relationships.
3. The human senses of vision and hearing perceive light and sound waves through the eye and ear, which have specific functional parts and ranges of detection. Various optical devices like lenses and mirrors manipulate light in practical applications.
Waves presentation
This document provides information about waves and different types of waves including sound waves and light waves. It defines key terms related to waves such as amplitude, frequency, wavelength, and speed. It explains that sound and light are both transmitted as waves and discusses how their properties including pitch, loudness, speed, and type of medium affect their transmission. The document also covers the electromagnetic spectrum and different types of electromagnetic waves including visible light, infrared, ultraviolet, X-rays, and gamma rays. It discusses how light interacts with materials through reflection, refraction, and absorption and explains vision and color.
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The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms for those who already suffer from conditions like anxiety and depression.
Unit 2 nutrition david
We eat food to obtain nutrients and vitamins that our bodies need, and our digestive system extracts these substances. In addition to digestion, respiration or breathing is also part of nutrition by providing oxygen. The circulatory system is essential for nutrition as it transports the nutrients we eat and oxygen we breathe to our organs, bones, brain, and muscles. Our blood contains three types of cells that each perform specific functions. Vitamins are essential nutrients our bodies need. Junk food contains high levels of sugar and fat, and if consumed in excess can accumulate in our bodies, causing weight gain and potential illness.
Unit 1 interaction alvaro s
The nervous system has three main parts: the brain, spinal cord, and nerves. The brain receives information and sends messages to the body via the spinal cord and nerves. The brain is made up of the cerebrum, cerebellum, and brainstem. Neurons are the basic building blocks of the nervous system and are composed of axons, dendrites, and a cell body. The five senses - sight, hearing, touch, smell, and taste - allow us to perceive the world around us. Each sense has specialized sensory organs that detect stimuli and relay this information to the brain via nerves.
Christmas fun lucia villacorta s
The children Elena, Carlota, and Matthew help their grandma decorate the Christmas tree while she tells them the story of Rudolph the Red-Nosed Reindeer. In the story, Rudolph is made fun of by the other reindeer for his shiny red nose until Santa realizes it will be useful for guiding his sleigh and makes Rudolph the lead reindeer. After the story, grandma and the children prepare chicken and biscuits for Christmas dinner and then join with family to eat and retell grandma's story.
Sleeping beauty patricia s
Sleeping Beauty is a short story by Patricia López Alvarez. It tells the tale of a princess who falls into a deep sleep after pricking her finger on a spindle. She sleeps for one hundred years until awakened by a prince's kiss. The prince breaks the spell and awakens the princess with true love's kiss, living happily ever after.
Unit3 nutrition monica s
Nutrients provide cells with energy and four body systems work together to carry out nutrition: the digestive system breaks down food and absorbs nutrients, the respiratory system inhales oxygen and exhales carbon dioxide for cellular respiration, the excretory system filters waste from the blood and removes it from the body through sweat and urination, and the circulatory system transports blood to circulate nutrients and oxygen to cells and remove waste.
Unit 5 energy deborah and ana s
Energy can exist in multiple forms including mechanical, light, sound, thermal, electrical, chemical, and nuclear. It can be renewable sources like water, wind, sun, biomass, or waves and tides, or non-renewable sources like fuels or uranium and plutonium. Our bodies transform the chemical energy from food into mechanical energy for movement. Electricity is a form of energy that can be easily transported through power lines and transformed into other types of energy like light. Static electricity occurs when an object accumulates an electrical charge, which can be neutral, positive, or negative. Electrical current is the movement of electrical charges through a conducting material. Producing and using electricity can cause problems to the environment like
Unit 4 human reproduction by alex and ivan s
The document summarizes the human reproductive system and process. It describes the primary and secondary sexual characteristics that develop during puberty in males and females. It then explains the male and female reproductive systems and organs. It outlines the process of fertilization, pregnancy, and labor, including how the embryo develops into a fetus and baby over trimesters until birth.
Unit 3 nutrtion tomas s
The document discusses four body systems involved in nutrition: the digestive system, respiratory system, circulatory system, and excretory system. The digestive system breaks down food and the respiratory system breathes in oxygen. The circulatory system transports nutrients and oxygen to cells through blood and blood vessels. It also removes waste from cells. The excretory system filters waste from the blood and removes it from the body through sweat and urine.
Unit 3 nutrtion tomas s
The document discusses four body systems involved in nutrition: the digestive system, respiratory system, circulatory system, and excretory system. The digestive system breaks down food and the respiratory system breathes in oxygen. The circulatory system transports nutrients and oxygen to cells through blood and blood vessels. It also removes waste from cells. The excretory system filters waste from the blood and removes it from the body through sweat and urine.
Unit 3 nutrition teresa david patricia s
The document discusses the four main systems involved in nutrition: the digestive system, respiratory system, excretory system, and circulatory system. It describes the key parts and functions of each system. The digestive system breaks down food, the respiratory system intakes oxygen and removes carbon dioxide, the excretory system removes waste from the blood, and the circulatory system transports nutrients, oxygen, carbon dioxide, and waste throughout the body. Together these four systems work to take in nutrients, distribute them to cells, and remove waste from the body.
Aladdin & the magic danae s
Aladdin is a poor boy who is tricked by a man claiming to be his uncle into finding a magic lamp for him. The man imprisons Aladdin but he discovers the lamp contains a genie who grants wishes. Aladdin uses the genie to become rich and rescue the princess from an evil genie, allowing him to marry her as promised by the king. In the end, Aladdin uses the genie to imprison the evil genie forever.
Sleeping beauty deborah s
There was once a magic kingdom with a King and Queen who wished for a child. They had a daughter, Princess Rose, and held a ball to celebrate. All the good fairies in attendance blessed Rose with gifts, but the final fairy had not been invited. She cursed Rose to prick her finger and die on her 16th birthday. Another fairy softened the curse so that Rose would instead fall into a deep sleep for 100 years. On her 16th birthday, Rose pricked her finger and fell asleep along with the entire kingdom for 100 years. A brave prince eventually found and woke Rose with true love's kiss, and they married, breaking the curse and living happily ever after.
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The document discusses human reproduction. It describes the primary and secondary sex characteristics that develop during puberty to distinguish males and females. It explains that sperm and ova are the reproductive cells, and describes the basic structures of the male and female reproductive systems. Fertilization occurs when an ovum and sperm join to form a zygote. Pregnancy lasts about 9 months, during which an embryo develops protected structures like the placenta and umbilical cord, before birth.
Unit 4 human reproduction alberto and diego s
Human reproduction involves the joining of male and female sex cells through sexual reproduction. The primary sexual characteristics are the reproductive systems which differ between males and females and are present at birth. Fertilization occurs when an ovum and sperm join inside the fallopian tubes to create a single cell called a zygote, which implants in the uterus wall and becomes an embryo, leading to pregnancy and culminating in labor and birth.
Unit 5 energy alberto s
Energy can exist in multiple forms and be obtained from both renewable and non-renewable sources. It transforms from one type to another and can power electrical systems. Producing and using energy has both benefits and environmental impacts. Conservation efforts aim to reduce energy usage and associated problems.
Unit2 sensitivity and coordination noemi and clara s
This document discusses the human senses and nervous system. It describes the organs of sight, smell, hearing, touch, and taste, as well as stimuli, responses, neurons, voluntary and involuntary movements, the skeleton, joints, musculature, and tendons. The nervous system is made up of the central nervous system including the brain and peripheral nerves. Neurons are specialized cells that transmit signals in the nervous system. Voluntary movements are controlled by the brain while involuntary movements are controlled by the spinal cord. The skeleton is composed of bones in the head, trunk, and limbs connected by ligaments and joints. Muscles are attached to bones via tendons and located in the head, trunk, and limbs.
Unit 4 human reproduction teresa s
This document summarizes the key aspects of human reproduction. It describes the primary and secondary sex characteristics that develop during puberty to distinguish males and females. It then outlines the male and female reproductive systems and their main organs. It explains that fertilization occurs when an egg and sperm join in the fallopian tubes to form a zygote, which implants in the uterus and becomes an embryo, leading to pregnancy. Pregnancy involves different structures that support the development of the embryo over nine months until birth.
Unit 3 nutrition pablo and victor s
The document discusses the four main body systems involved in nutrition: the digestive system, respiratory system, circulatory system, and excretory system. The digestive system transforms food into nutrients using the digestive tract and glands. The respiratory system is responsible for breathing in oxygen and out carbon dioxide. The circulatory system transports nutrients and oxygen to cells using the heart and blood vessels. Finally, the excretory system filters waste from the blood and removes it from the body through excretion.
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Light and sound by María and Andrea
- 2. Light is a form of energy. We can see objects because they reflect light. They can be natural or artificial.
- 3. The Sun is a source of natural light. A light bulb is a source of artificial light.
- 4. Light travels in straight lines and in all directions from the source of light. Light travels very quickly, at 300,000 kilometres per seconds.
- 5. Light passes through transparent materials. Only part of the light passes through translucent materials. Light rays separate into different directions. Light does not pass through opaque materials.
- 6. Reflection lets us see objects that do not emit light. When light reaches an opaque object, it hits the object and light changes its direction. It reflects the light. When we look in a mirror, we see our reflection in it because light rays do not separate.
- 7. When a ray of light goes from air to water, its speed changes. As a result, the ray changes its path. This is called refraction. o When white light passes through a drop of rain, the ray of light refrects. Each ray of colours separates, forming a rainbow. o Light also refracts when its passes through a lens. There are two tipes of lenses, coverging and diverging.
- 9. Glasses and contact lenses. Projectors: Telescopes and binoculars. Magnifying glasses and microscopes.
- 11. Sound is a form of energy produced by vibrations.Our vocal cords vibrate and create our voices.
- 12. Intensity. Sounds can be soft or loud. Pitch can be high or low. Timbre is the quality of a sound.
- 13. Sound travels in all directions and In straight line. Sound is slower than light.It travels at 340 metres por second.
- 14. When the sound waves reach an obstacle,they reflect in two different ways: Echo happens when the obstancle is more than 17 metres away. Reverberation happens when the obstacle is a shoter distance away.The reflected sound mixes with the emitted sound.