P14.2 Refraction of light

Question 1

What is refraction?

Answer 1

When waves change direction

Question 2

Why do waves refract?

Answer 2

When they travel across a boundary between 2 different medium they change direction

Question 3

What direction does light ravels as it moves in to a more optically dense medium?

Answer 3

Towards the normal

Question 4

What direction does light ravels as it moves in to a less optically dense medium?

Answer 4

Away

Question 5

When does partial refraction occur?

Answer 5

When waves cross a boundary between 2 materials

Question 6

What happens to the waves that cross the boundary?

Answer 6

They have a lower energy and a smaller amplitude

Question 7

What are the refraction rules when light travels from air into glass?

Answer 7

Light changes direction towards the normal

The angle of refraction is smaller than the angle of incidence

Question 8

What are the refraction rules when light travels from glass into air?

Answer 8

Light changes direction away from the normal

The angle of refraction is greater than the angle of incidence