Light Rays

Question 1

What happens when the ray enters the block at 90°

Answer 1

It carries straight on/straight ahead. The light slows down

Question 2

What happens when the rays enters the block at any others angle.

Answer 2

It bends/refract. If it enters at any other angle it changes directions on entry or exist. Slow down. it carries on straight on without changing direction. The light does slow down.

Question 3

What happens when the ray comes out of the block at 90°

Answer 3

It carries straight on. Slows down

Question 4

What happens when the ray comes out of the block at any other angle

Answer 4

It bends back again to the same angle it went in at. Speeds up.

Question 5

Compare the direction of the ray entering the block with the direction of the ray emerging from the opposite side.

Answer 5

They are parallel but no longer in line with each other speeds up.

Question 6

Refraction occurs when a wave moves from one medium to a different medium and changes speed.

Answer 6

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°

Question 7

What do you notice about the laser beam as it enters the water

Answer 7

It bends

Question 8

Does it bend towards or away from the imaginary normal line (90° to the surface)?

Answer 8

Towards

Question 9

Give an example of an animal who would need to understand refraction to live and explain why

Answer 9

Archers fish, fish diving birds