refraction

Question 1

State what happens to the speed of the wave when it passes through a substance with a higher refractive index.

Answer 1

decreases

Question 2

State what happens to the frequency of the wave when it passes from a low refractive index to a high refractive index.

Answer 2

stays constant

Question 3

How should the normal be drawn?

Answer 3

perpendicular to the boundary

Question 4

State what happens to the wave when it moves from a substance of lower IR to higher IR.

Answer 4

• moves towards the normal
• moves slower

Question 5

State what happens to the wave when it moves from a substance of higher IR to lower IR.

Answer 5

• moves away from the normal
• moves faster

Question 6

What is refraction?

Answer 6

• when a wave changes direction
• as it crosses the boundary between two substances
• with different indices

Question 7

State how the refractive index vary for the colours of light. What does this mean?

Answer 7

• increases from red to violet
• violet rays will bend/refract more than red rays