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What is an example of an aritifical form of light?
light bulbs/screens
What is an example of an articial source of light?
light bulbs/screens
What is a light beam?
A light beam is made up of multiple light rays
What are two types of rays that humans cannot see?
UV (ultraviolet rays) and X-rays
What type of rays do humans see?
light rays/visible light rays
Light travels at a speed of.....
300 000km/s
What are the three things that happen to light?
Light can be deflected, reflected or absorbed
What type of surface would light reflect off?
A white surface, a reflective surface like a mirror.
What type of surface would absorb all light rays?
A black surface
In what circumstance would light be deflected? What would happen to the light?
If light travels from air to water, it would bend which would be deflection
What object allows you to see all the colors of the rainbow that are present in white light?
a prism
How does light travel?
In a straight line
If light hits a surface that is blue, what happens?
All the rays are absorbed except the blue ray is reflected.
If light hits a red surface, what happens?
All the rays are absorbed, except the red ray is reflected.
What does opaque mean?
Not see through, an opaque object doesn't let light through
In what conditions would we not be able to percieve color?
If it is dark, we cannot perceive color becayse there is not enough light for us.
What type of surface would reflect light?
A perfectly smooth surface, like a mirror or the calm water of a lake
When light passes from air to water, the rays are......
deflected
What is the definition of refraction?
Deflection of a light ray when it passes from one transparent medium into another
What is the definition of reflection?
Change of direction of a light ray on contact with a medium that sends it back to its original medium.