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Year 8 Light 1

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

Which of these best demonstrates the reflection of light? (5.6C)

a)

Looking through the glass of a large window

b)

Looking at an image formed on a silver spoon

c)

Looking at a lightbulb that is glowing

d)

Looking at a star on a clear night

2.

When light travels through air into a prism, it bends and separates into many colors. In which other situation does light bend? (5.6C)

a)

When light moves through air into water

b)

When light hits a wall

c)

When light passes through outer space

d)

When light hits a mirror

3.
Which explains why the fork looks different under water?
a)
light can't pass through the glass
b)
the wavelength of light lengthens
c)
the amount of light increases when going through water
d)
light is refracted at an angle
4.
Which term means to bounce off the surface of something?
a)
Refract
b)
Absorb
c)
Reflect
d)
prism
5.
This is used to separate white light into colors. 
a)
prism
b)
reflection
c)
sunlight
d)
spectrum
6.
By passing light through a prism, you can tell ____________.
a)
that white light is made of different colors
b)
the weight of the prism
c)
the original source of light
d)
that blue light is brighter than white light
7.
Which example shows light being reflected?
a)
using a microscope to make small objects look larger
b)
using a prism to show the colors of the spectrum
c)
using eyeglasses to see things better
d)
using a mirror to see your image
8.
When a pencil is put into a glass of water, it appears to be broken? Why does the pencil look broken?
a)
because the shiny glass reflects light
b)
because the water separates light into many colors
c)
because the part of the pencil outside the water casts a shadow
d)
because light rays are bent when they pass from air into water
9.
When light bounces off a smooth surface, this is known as which of the following?
a)
reflection
b)
refraction
c)
absorption
d)
deflection
10.
Bending of light as it passes from one material to another is known as which of the following?
a)
absorption
b)
reflection
c)
refraction
d)
mirror image
11.

When light passes from air to water, what happens to the speed of the light?

a)

speeds up

b)

slows down

c)

stays the same

12.

In the diagram, which letter represents the angle of incidence?

a)

A

b)

B

c)

C

d)

D

13.
........... – the angle between the normal and the reflected ray.
a)
Angle of incidence
b)
Angle of reflection
c)
Angle of coincidence
d)
Angle of direction
14.
The ray of light that strikes a reflecting surface is called ________.
a)
incident ray
b)
reflected ray
c)
normal ray
d)
none of the above
15.

1. Sami is 50 cm from a vertical mirror. He moves 20cm away. The distance between his image and himself is then ………….

a)

100cm

b)

120cm

c)

140cm

d)

40cm

16.

2. The imaginary line perpendicular to the mirror is called the

a)

Incident ray

b)

reflected ray

c)

normal line

17.

3. The angle between the reflected ray and the normal line is called the:

a)

Angle of incidence

b)

Angle of reflection

c)

angle of convergent

18.

4. If the angle of incidence is 45 degree, what is the angle of reflection?

a)

90°

b)

45°

c)

180°

19.

The Law of reflection states that - The angle of incidence is .................. the angle of reflection

a)

equal to

b)

double

c)

half

20.

Why can you see most objects?

a)

they emit light

b)

light refracts through them

c)

light reflects off them

d)

They absorb light

21.

A copy of an object formed by reflected or refracted rays of light

a)

image

b)

regular reflection

c)

reflection

d)

diffuse reflection

22.

A _________ forms when the path of light is blocked.

a)

sun

b)

circle

c)

line

d)

shadow

23.

An image that you can see , but does not really exist is called which of the following

a)

Real Image

b)

Fake Image

c)

Virtual Image

d)

Digital Image

24.

When a ray passes along the normal,

a)

it bends towards normal

b)

it bends away from the normal

c)

it suffers no deviation

25.

Image formed by a plane mirror is

a)

virtual behind the mirror and enlarged

b)

virtual, behind the mirror and of the same size as the object

c)

real at the surface of mirror and enlarged

d)

real , behind the mirror and of same size as the object.

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