Reflection And Refraction Of Light

Question 1

The law of reflection states that…

Answer 1

The angle of incidence is equal to the angle of reflection.

Question 2

What happens with mirrors?

Answer 2

Images in mirrors are virtual they look like they are behind the mirror because the light shining off the object then shines off the mirror and back to your eye.

Question 3

What does it mean when you can’t see a clear reflection?

Answer 3

Whether or not you can see a clear reflected image depends on how smooth the surface is .

Question 4

What is it called when light goes from a rough surface and a smooth surface then to your eye?

Answer 4

If it is a smooth surface it is called specular reflection and if it is a rough surface it is called diffuse scattering

Question 5

What is refraction?

Answer 5

Refraction is when light changes direction when it travels from one medium to another.

Question 6

What is a medium?

Answer 6

Material, such as water or air

Question 7

Why does refraction happen?

Answer 7

Refraction happens becuase

Question 8

How are rays of light refracted if they slow down, for example going from air to glass?

Answer 8

The rays of light are refracted towards the normal.

Question 9

How are rays of light refracted if they speed up, for example going from water to air?

Answer 9

The rays of light will be refracted away from the normal

Question 10

Lenses use refraction to…

Answer 10

Spread out or focus light.

Question 11

Convex (or converging) lenses (like the ones in your eyes) are…..

Answer 11

Shaped to focus the light to a point - called the focal point