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KS3 Light

Total questions: 60

Worksheet time: 42mins

Name
Class
Date
1.
Light travels in a straight line
a)
True
b)
False
2.
Another name for light bending is ....
a)
Reflaction
b)
Absorbing
c)
Refraction
d)
mirror
3.
Material that allows light to pass through allowing you to see "clearly" to the other side
a)
opaque
b)
translucent
c)
transparent
4.

Which statement is true for refraction of light? Choose 2 answers.

a)

When it enters a denser medium (e.g. from air to glass), it changes direction towards the normal.

b)

When it enters a denser medium (e.g. from air to glass), it changes direction away from the normal.

c)

When it enters a less dense medium (e.g. from glass to air), it changes direction towards the normal.

d)

When it enters a less dense medium (e.g. from glass to air), it changes direction away from the normal.

5.
The Law of Reflection:
The angle of incidence is _________ the angle of reflection
a)
bigger than
b)
the same as
c)
smaller than
6.
Luminous means...
a)
Gives out its own light
b)
Reflects light from other things
7.
White light is made up of _________________ colors.
a)
10
b)
3
c)
7
d)
70
8.
If light strikes a mirror at a 50⁰ angle, what angle will it come off of the mirror?
a)
50⁰
b)
70⁰
c)
45⁰
d)
30⁰
9.
a)

Image

b)

Reflection

c)

Shadow

d)

Colour

10.

Which of the following does not have light of its own?

a)

a torch

b)

a lamp

c)

the moon

d)

the sun

11.

Opaque is?

a)

Material that allows light to pass through

b)

Light made by nature

c)

Material that allows no light to pass through

12.
What does reflection mean?
a)
Light bouncing off an object.
b)
Light is bending around an object.
c)
Light is moving through and object.
d)
This is no light.
13.

Why does the cat form a shadow?

a)

It reflects light

b)

It blocks light

14.
Which part of the eye opens in dark places and closes in bright places?  
a)
Cornea
b)
Retina
c)
Pupil
d)
Lens
15.
Which part of the eye contains light sensitive nerves?  
a)
Cornea
b)
Lens
c)
Retina
d)
Vitreous Humor
16.

How does the light enter the pinhole camera?

a)

through a lens

b)

through a mirror

c)

through a small hole

d)

through a prism

17.

When the light hit an opaque object, what happens to it?

a)

it is scattered in all directions

b)

some of it is absorbed, some of it is transmitted

c)

All of it is absorbed

d)

All of it is reflected

18.

When an angle of incidence is increased, what happens to the angle of reflection?

a)

it increases

b)

it decreases

c)

it stays the same

d)

it becomes more diffuse

19.

When white light strikes a blue object, which color(s) is/are absorbed?

a)

None of the colors are absorbed but blue

b)

Some of the red

c)

Mostly the green

d)

all colors are absorbed but blue

20.
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
21.
Smooth surfaces _______ a lot of light.
a)
reflect
b)
bend
c)
absorb
d)
twist
22.
Why do we see objects as white?
a)
They absorb all light
b)
They reflect all light
c)
They absorb some light and reflect some light
23.
Band of color in a rainbow, or from a light passing through a prism.
a)
Spectrum
b)
Space
c)
Prism
d)
Refraction
24.
What does light do when it hits an object that it cannot pass through?
a)
It creates a shadow
b)
It passes through anyway
25.
Which color absorbs all light?
a)
White
b)
Black
c)
Orange
d)
Green
26.
Which color reflects all light?
a)
White
b)
Black
c)
Orange 
d)
Green
27.
What colours is white light made from?
a)
Orange, Green, Pink, Magenta, Peach, Rose, Lemon
b)
Red, Orange Yellow, Green, Black, Indigo, Violet
c)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
d)
Red, Orange, Yellow, Grey, Blue, Indigo, Violet
28.
Why does this the t-shirt appear red and the shorts appear blue?
a)
The t-shirt reflects red light, the shorts reflect green light, other colours are absorbed.
b)
The t-shirt reflects blue light, the shorts reflect red light, other colours are absorbed.
c)
The t-shirt reflects red light, the shorts absorb yellow light, all other colours are reflected
d)
The t-shirt reflects red light, the shorts reflect blue light, other colours are absorbed.
29.

Light travels... (select 2 answers)

a)

Around corners

b)

In straight lines

c)

Faster in glass than in air

d)

Faster than sound

30.

The speed of light is.....

a)

300,000,000m/s

b)

340m/s

c)

1500m/s

d)

5000m/s

31.

The speed of sound in air is.....

a)

1500m/s

b)

340m/s

c)

5000m/s

d)

300,000,000m/s

32.

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

a)

A

b)

B

c)

C

d)

D

33.

Nothing can travel faster than light in the whole universe

a)

False

b)

True

34.
Which color travels the quickest and has the shortest wavelength?
a)
Red
b)
Violet
35.

What is happening to the light ray at the surface of the water to mean the fish appears higher up than it is?

a)

The light ray is reflecting

b)

The light ray is refracting

c)

The light ray is scattering

d)

The light ray is absorbed

36.

If I shine white light at a red filter, what will I see the other side of the filter?

a)

White light

b)

No light

c)

Red light

d)

Yellow light

37.

Which figure represents the path light takes through a converging lens?

a)
b)
c)
d)
38.
Which color travels the slowest and has the longest wavelength?
a)
Violet
b)
Red
39.

What does "refraction" mean?

a)

The change of direction of a light ray

b)

The increase of mass in an object

c)

The increase of temprature

d)

The way a luminous object reflects light

40.

What is are the 2 different types of reflection?

a)

Reflected Ray / Rough Surface

b)

Specular Scattering

c)

Specular Reflection / Diffuse Scattering

d)

Rough Transprent / Diffuse Surface

41.

What are the 2 different types of lenses?

a)

Convex / Converge

b)

Coverage / Conrage

c)

Croex / Contage

42.

PLANE MIRROR

a)

SPECULAR

b)

DIFFUSE

43.

WAVY SEA

a)

SPECULAR

b)

DIFFUSE

44.

SNOW

a)

SPECULAR

b)

DIFFUSE

45.

GLARE ON PAIR OF EYEGLASSES

a)

SPECULAR

b)

DIFFUSE

46.
What is the incident ray?
a)

The ray of light leaving the mirror

b)

The ray of light approaching the mirror/the ray given off from a light source

47.
The point from which all of the light rays diverge is called the:
a)
image point
b)
luminous object
c)
origin
d)
focal point
48.

The picture shows which type of reflection?

a)

Specular Reflection

b)

Optical Reflection

c)

Diffuse Reflection

d)

Scatter Reflection

49.

The angle between the incident ray and the normal. (X on the diagram) is called the:

a)

Angle of Optic Sight

b)

Angle of Reflection

c)

Angle of Incidence

d)

Angle of Normal

50.

The angle between the reflected ray and the normal (labelled Y on the diagram) is called the:

a)

Angle of Incidence

b)

Angle of Reflection

c)

Angle of Normal

d)

Angle of Optic Sight

51.

An imaginary line that is drawn at a right angle (90 degrees) to a mirror (Green line) is called the:

a)

Reflected Ray

b)

Normal

c)

Incident Ray

d)

Perpendicular Ray

52.

When light reflects off of a completely smooth surface it is called:

a)

Diffuse Reflection

b)

Optical Reflection

c)

Smooth Reflection

d)

Specular Reflection

53.

If the angle of incidence in the diagram is 80°, the angle of reflection will be:

a)

10°

b)

100°

c)

90°

d)

80°

54.

Match the following

a)

Opaque

1.

Materials light cannot pass through

b)

Lens

2.

Piece of glass that focuses light

c)

Specular

3.

Reflection from a smooth surface

d)

Luminous

4.

Something that gives out light

e)

Normal

5.

Imaginary lines at right angles to a surface

55.

what are primary colors

a)

red

b)

purple

c)

yellow

d)

blue

56.
Light enters the eye through the....
a)
iris
b)
cornea
c)
retina
d)
pupil
57.
Upside down images are formed on the ____________ at the back of the eyeball.
a)
cornea
b)
iris
c)
retina
d)
pupil
58.

This polar bear is happy because someone gave him a pumpkin to play with. But, this polar bear is sad because it looks like his head is no longer attached to his body. :( What property of light creates this optical illusion?

a)

Refraction

b)

Reflection

c)

Transparency

d)

Opaqueness

59.

Reorder the sentences to show the process of how the eye enables us to see objects.

a)

Light enters the eye through the pupil

b)

The size of the pupil is altered by the iris

c)

The cornea and lens, focus light onto the retina

d)

The retina contains two light sensitive cells called rods and cones. When light hits these cells, chemical reactions produce electrical impulses that travel via the optic nerve to the brain

1)
2)
3)
4)
60.

Label the different part of the eye

a)Retina
b)Iris
c)Cornea
d)Pupil
e)Lens
f)Optic Nerve
1
2
3
4
5
6
1)
2)
3)
4)
5)
6)

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