Chapter 3: Light Flashcards
(9 cards)
1
Q
What is a luminous object?
A
Objects that are sources of light
2
Q
What is the speed of light in a vacuum?
A
300,000 km/s
3
Q
What does a prism do?
A
It refracts different colours of light by different amounts
4
Q
What are the primary colours of light?
A
Red, green and blue
5
Q
What does the law of reflection state?
A
That the angle of incidence is equal to the angle of reflection
6
Q
What is refraction?
A
When light changes direction when it travels from one medium to another
7
Q
Why does refraction happen?
A
As light travels at different speeds in different materials
8
Q
What are lenses?
A
Things that use refraction to spread out or focus light
9
Q
What is a convex
A
Lenses that are shaped to focus the light to a point- named the focal point
