The document discusses light sources and how light travels. The major natural light source is the sun. Light travels in straight lines and can be reflected, absorbed, or pass through objects. It is reflected off opaque objects, absorbed by some objects, and passes through transparent or translucent objects. The eyes see light that enters through the cornea and is focused on the retina, where light information is sent to the brain to be interpreted as vision. Shadows are formed when light is blocked by opaque objects. The position of the sun affects the length and location of shadows outside.
Slide that I created to support teaching science to my lower secondary student (Grade 7). The topic is Ray Model of Light. Some contents (pics and videos) are not mine. Hope it is useful for all teacher around the globe.
Light is a transverse, electromagnetic wave that can be seen by humans. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum. The transverse nature of light can be demonstrated through polarization.
Slide that I created to support teaching science to my lower secondary student (Grade 7). The topic is Ray Model of Light. Some contents (pics and videos) are not mine. Hope it is useful for all teacher around the globe.
Light is a transverse, electromagnetic wave that can be seen by humans. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum. The transverse nature of light can be demonstrated through polarization.
In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. ... Like all types of EM radiation, visible light propagates as waves. However, the energy imparted by the waves is absorbed at single locations the way particles are absorbed.
The Physics of Light, ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. ... Like all types of EM radiation, visible light propagates as waves. However, the energy imparted by the waves is absorbed at single locations the way particles are absorbed.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
5. Are these light sources?
moon
water
mirror
These items are not light sources, instead they
are reflecting light from other sources.
6. How does light travel?
Light rays travel in straight lines from the light source.
When it hits an opaque (ogenomskinlig) object, some light is
absorbed and the rest reflects off.
If the object is transparent (genomskinlig), light rays pass
through it easily.
If the object is translucent (genomskinlig), some light can
pass through, but the rest of the light will be reflected.
light
source
7. How do we see?
Light coming from, (or reflecting off)
objects enters the eye through the cornea
then the pupil.
It is focused clearly by the lens on to the
retina.
The light sensitive cells of the retina gather
information about patterns of light and dark,
colour and movement and send it through the
optic nerve.
8. How do we see?
Information entering the brain through the
optic nerve, is then transmitted through
more nerve pathways to the visual cortex.
Here the patterns of light and dark, colour
and movement are interpreted.
The brain, based on past experience, can
then understand what it ‘sees’.
9. How do we see colour?
light
source
Light from most light
sources looks white, but
actually contains all the
colours of the spectrum;
also known as the
rainbow.
If an object looks blue, it
is absorbing every colour
except blue, which is
reflecting off it and
entering your eyes.
If an object looks orange,
it is absorbing every colour
except orange, which,
again, is reflecting off and
entering your eyes.
If an object looks red...
(You get the idea!)
10. How does light reflect?
Angle of incidence (infallsvinkel)
Angle of reflection (reflektionsvinkel)
The ‘angle of
reflection’ is
always equal
to the ‘angel
of incidence’.
12. How does light form shadows?
Light rays travel in straight lines, radiating out from the
light source.
If rays are blocked by an opaque object a shadow forms
where the light cannot reach.
If the light source is moved closer to the object, more
light is blocked and a larger shadow is formed.
light
source
light
source
13. How does sunlight cause shadows?
6am
8am
9am
12am
2pm 10am
3pm
4pm
7pm
Looking North,
the Sun appears
to rise in the
East...
...and travel
across the sky
until it sets in the
West.
The position of the
Sun effects the
position and length of
the shadows created.
Thanks to this
natural phenomenon a
sundial is able to tell
us the time, as long
as it is a sunny day!
14. Now explain to your partner:
What is the
difference between
light from the Sun
and light from the
moon?
Why does the
Sun rise in
the East and
set in the
West?
Why does an
orange look a
different colour
to a banana?
How does a
periscope
work?
Why can’t we
see anything
without a
light source?
15. Now write answers to these
questions:
1. What are the three types of objects which when light can be shone upon.
2. Describe what happens to the light when it hits each of these objects. Use a
diagram to help to answer the question. (Use a ruler to draw the straight lines)
3. Draw and label a diagram of a ray of light from a light source and then
reflecting off an opaque object.
16. How does light reflect?
Angle of incidence (infallsvinkel)
Angle of reflection (reflektionsvinkel)
The ‘angle of
reflection’ is
always equal
to the ‘angel
of incidence’.
