refraction Flashcards
1
Q
State what happens to the speed of the wave when it passes through a substance with a higher refractive index.
A
decreases
2
Q
State what happens to the frequency of the wave when it passes from a low refractive index to a high refractive index.
A
stays constant
3
Q
How should the normal be drawn?
A
perpendicular to the boundary
4
Q
State what happens to the wave when it moves from a substance of lower IR to higher IR.
A
- moves towards the normal
- moves slower
5
Q
State what happens to the wave when it moves from a substance of higher IR to lower IR.
A
- moves away from the normal
- moves faster
6
Q
What is refraction?
A
- when a wave changes direction
- as it crosses the boundary between two substances
- with different indices
7
Q
State how the refractive index vary for the colours of light. What does this mean?
A
- increases from red to violet
- violet rays will bend/refract more than red rays
