Refraction

Question 1

What happens when light travels from one medium to another

Answer 1

It bends (because it is changing speed)

Question 2

What does light travel slowest optically in?

Answer 2

Dense materials

Question 3

What does light travel fastest in?

Answer 3

A vacuum

Question 4

Name lenses that exhibit refraction

Answer 4

Eye lens, camera lens etc

Question 5

What happens when light enters a glass block at 90 degrees?

Answer 5

It goes straight through

Question 6

What happens when light enters a block at any other angle than 90 degrees?

Answer 6

It changes direction at the entering

Question 7

What happens when a ray COMES OUT of a block at 90 degrees

Answer 7

It continues straight

Question 8

What happens when a ray comes out of a block at any other angle than 90 degrees

Answer 8

It changes direction again (parallel with direction of light going into block)

Question 9

The direction of a ray entering a block/direction of ray emerging from opposite side is what?

Answer 9

Parallel

Question 10

Give a summary of refraction

Answer 10

It occurs when waves move from transparent medium to different transparent medium.
When light moves from air to glass it slows down
When light moves from glass to air it speeds up
Light will not bend when it enters a different material at 90 degrees