Light

Question 1

In a flat mirror, the angle of incidence is equal to …….

Answer 1

The angle of reflection

Question 2

In a ray diagram, a normal is a line drawn at …….

Answer 2

90° to the mirror’s surface

Question 3

Light travels …….

Answer 3

Fastest in a vacuum

Question 4

We usually look at our reflection in a flat mirror. This type of mirror is a …….

Answer 4

a plane mirror

Question 5

Light travels in …….

Answer 5

Straight lines

Question 6

Light from the Sun is called ……

Answer 6

white light

Question 7

When light travels from air to glass ….

Answer 7

It slows down

Question 8

Light can be split into colours of the spectrum using a prism. This is called …….

Answer 8

dispersion

Question 9

Grass looks green because …..

Answer 9

It reflects green light

Question 10

The three primary light colours are …

Answer 10

Red, blue and green

Question 11

Light that is dispersed by a prism is know as a

Answer 11

spectrum

Question 12

Red has a wave length of

Answer 12

low frequency

Question 13

Coloured filters only let

Answer 13

their colour through

Question 14

light waves are

Answer 14

transverse waves

Question 15

The speed of light in a vacuum is

Answer 15

300 million metres per second

Question 16

The light from the sun gets to Earth in

Answer 16

8.3 minutes

Question 17

A clear reflection from a mirror is known as

Answer 17

specular reflection

Question 18

Rough surfaces look dull, light is scattered, this is known as

Answer 18

diffuse reflection

Question 19

When light goes from a less dense medium to a more dense medium

Answer 19

light bends towards the normal

Question 20

When light goes from a more dense medium to a less dense medium

Answer 20

light bends away from the normal

Question 21

A convex lens bulges outwards

Answer 21

it causes rays of light to converge (move together)