Light

Question 1

Incident ray

Answer 1

The light ray that strikes a surface

Question 2

Reflected ray

Answer 2

The light ray that reflects from a surface

Question 3

Normal

Answer 3

A line that is at 90 degrees

Question 4

Angle of incidence

Answer 4

The angle between the incident ray and the normal

Question 5

Angle of reflection

Answer 5

The angle between the reflected ray and the normal

Question 6

Plane mirror

Answer 6

A mirror with a flat surface

Question 7

What is the law of reflection?

Answer 7

The angle of incidence and angle of reflection are the same

Question 8

What is refraction

Answer 8

Bending of light

Question 9

What is reflection

Answer 9

When light bounces off an object

Question 10

Why does refraction happen

Answer 10

It happens because the light is travelling from one medium to another and the speed changes making it bend towards or away from the normal

Question 11

What is a prism

Answer 11

A plastic block with a triangular cross-section

Question 12

What is dispersion

Answer 12

Splitting of white light into different colours

Question 13

What is the colour if all the colours are reflected

Answer 13

White

Question 14

What is the colour if all the colours are absorbed

Answer 14

Black

Question 15

Red+blue = ?

Answer 15

magenta

Question 16

Green+blue = ?

Answer 16

cyan

Question 17

red+blue+green = ?

Answer 17

white

Question 18

red+green = ?

Answer 18

yellow

Question 19

What does a filter do?

Answer 19

It absorbs the rest of the colours and whatever color the filter is, that color will pass through