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IGCSE Physics Light and Lenses

Total questions: 144

Worksheet time: 2hrs 21mins

Name
Class
Date
1.
A converging lens is also known as a ____ lens.
a)
convex
b)
concave
c)
double
d)
refracted
2.
When an object is placed on the focal point in front of a convex lens, the image produced is ___.
a)
real, reduced, and inverted
b)
real, enlarged, and inverted
c)
real, true, and inverted
d)
There is no image
3.
When an object is placed between the focal point and the convex lens, the image produced is ___.
a)
real, reduced, and inverted
b)
real, enlarged, and inverted
c)
virtual, enlarged, and upright
d)
virtual, reduced, and upright
4.
A diverging lens is also known as a ____lens.
a)
refracted
b)
diffracted
c)
convex
d)
concave
5.
___ is when light travels through a material and bends.
a)
Diffraction
b)
Dispersion
c)
Mirage
d)
Refraction
6.
The point where the rays meet is known as....
a)
Fire
b)
the focal point
c)
refraction
d)
Plane of the lens
7.
This image is.....
a)
inverted and smaller
b)
inverted and larger
c)
not inverted and smaller
d)
not inverted and larger
8.
This image is...
a)
Inverted and smaller
b)
inverted and bigger
c)
not inverted and smaller
d)
not inverted and bigger
9.
a real image...
a)
is produced by virtual rays and can be projected on a screen
b)
is produced by real rays and cannot be projected on a screen
c)
is produced by virtual images and cannot be projected on a screen
d)
is produced by real rays and can be projected on a screen
10.
Which describes a convex lens?
a)
triangular in shape
b)
more transparent in the middle
c)
thicker on the edges than in the middle
d)
thicker in the middle than on the edges
11.
What type of lens do humans have in their eyes? 
a)
Concave Lens 
b)
Convex Lens 
12.
What type of image is formed when rays of light actually intersect?
a)
real
b)
virtual
c)
projected
d)
curved
13.
If an object's distance from a convex lens were increased, the image would become which of the following?
a)
Larger and virtual
b)
Larger, only
c)
Smaller, only
d)
Smaller and virtual
14.
Is a concave lens thicker or thinner in the middle? 
a)
Thicker 
b)
Thinner 
15.

Is a convex lens thicker or thinner in the middle?

a)

Thicker

b)

Thinner

16.

A diverging lens is also known as a ____lens.

a)

refracted

b)

diffracted

c)

convex

d)

concave

17.

What does the word "diverging" mean?

a)

to spread apart

b)

to come together

c)

parallel

d)

perpendicular

18.

A converging lens is also known as a ____ lens.

a)

convex

b)

concave

c)

double

d)

refracted

19.

What does the word "converging" mean?

a)

to separate

b)

to come together

c)

parallel

d)

perpendicular

20.

This image is.....

a)

inverted and smaller

b)

inverted and larger

c)

not inverted and smaller

d)

not inverted and larger

21.

When an object is placed between the focal point and the convex lens, the image produced is ___.

a)

real, reduced, and inverted

b)

real, enlarged, and inverted

c)

virtual, enlarged, and upright

d)

virtual, reduced, and upright

22.
This image is.....
a)
inverted and smaller
b)
inverted and larger
c)
not inverted and smaller
d)
not inverted and larger
23.
This image is...
a)
Inverted and smaller
b)
inverted and bigger
c)
not inverted and smaller
d)
not inverted and bigger
24.
a real image...
a)
is produced by virtual rays and can be projected on a screen
b)
is produced by real rays and cannot be projected on a screen
c)
is produced by virtual images and cannot be projected on a screen
d)
is produced by real rays and can be projected on a screen
25.
Which describes a convex lens?
a)
triangular in shape
b)
more transparent in the middle
c)
thicker on the edges than in the middle
d)
thicker in the middle than on the edges
26.
Is a convex lens thicker or thinner in the middle?
a)
Thicker 
b)
Thinner 
27.
What type of image is formed when rays of light actually intersect?
a)
real
b)
virtual
c)
projected
d)
curved
28.
___ is when light travels through a material and bends.
a)
Diffraction
b)
Dispersion
c)
Mirage
d)
Refraction
29.

Which of the following are uses for convex lenses? (Choose all that are correct)

a)

Camera lens

b)

Telescope lens

c)

Microscope lens

d)

Magnify glass

30.

Choose all correct statements for a virtual image

a)

Cannot be projected on to a screen

b)

Can be projected on to a screen

c)

Light rays do not pass through image

d)

Light rays do pass through image

31.

When doing a ray diagram, you can represent an image as:

a)

An arrow labelled image

b)

An arrow

c)

An arrow labelled object

d)

An eye

32.

If asked to draw an eye on a ray diagram, it is always:

a)

the opposite side to the object

b)

the opposite side to the image

c)

Always right of the lens

d)

Always left of the lens

33.

What is the distance between the the center of the lens and the focal points called?

a)

principal axis

b)

focal length

c)

focal distance

d)

lens radial line

34.
When an object is placed between the focal point and the convex lens, the image produced is ___.
a)
real, reduced, and inverted
b)
real, enlarged, and inverted
c)
virtual, enlarged, and upright
d)
virtual, reduced, and upright
35.
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
36.
A _______ breaks white light into colors.
a)
prism
b)
visible spectrum
c)
shadow
d)
lens
37.
When all light can pass through an object, that object is:
a)
translucent
b)
transparent
c)
opaque
d)
reflected
38.
Light travels in ____ lines called waves.
a)
straight
b)
curvy
39.
A ___ lens makes objects appear bigger.
a)
concave
b)
convex
c)
prism
d)
flat
40.
This image is...
a)
Inverted and smaller
b)
Inverted and larger
c)
not inverted and smaller
d)
not inverted and larger
41.
An incident ray that is parallel to the principal axis...
a)
will reflect parallel to the principal axis
b)
will refract through the focal point
c)
will reflect through the center of curvature
d)
will continue along the same path through the lens
42.
a real image...
a)
is produced by virtual rays and can be projected on a screen
b)
is produced by real rays and cannot be projected on a screen
c)
is produced by virtual images and cannot be projected on a screen
d)
is produced by real rays and can be projected on a screen
43.
What is Nearsightedness? 
a)
condition that has difficulty seeing things that are close 
b)
condition that has difficulty seeing things that are far away
44.
How is a rainbow created?
a)
All colors are reflected off of an object.
b)
White light is refracted through a prism.
c)
White light is reflected off of a mirror.
d)
All colors are absorbed by a prism.
45.
Rainbows are produced when
a)
light exits many raindrops at different angles
b)
the sun causes a rainstorm
c)
the spectrum causes a rainstorm
d)
the sun comes out after a storm
46.
Light bending as it passes through a rain drop is an example of...
a)
Refraction
b)
Reflection
47.

When will total internal reflection occur?

a)

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

b)

When the angle of incidence is smaller than the critical angle

c)

When the angle of incidence is greater than the critical angle

d)

When the light cannot pass through a medium

48.

The above image is an example of a ____________. They happen because cool and hot air have a different ___________________________.

a)

Mirage; angle of incidence

b)

Optical fibre; refractive index

c)

Lateral inversion; angle of reflection

d)

Mirage; refractive index

49.

The focal length of this lens is _______.

a)

negative because it can form real images

b)

positive because it can form real images

c)

negative because it can form virtual images

d)

could be positive or negative depending on the image formed

50.

A person standing in front of a lens creates an image that is both smaller than the original and closer to the lens. Classify the image formed in this scenario.

a)

real, inverted

b)

real, upright

c)

virtual, inverted

d)

virtual, upright

51.

Classify the image formed in this scenario.

a)

real, inverted, larger than original

b)

real, inverted, smaller than original

c)

virtual, upright, larger than original

d)

virtual, upright, smaller than original

52.

the bending of light

a)

refraction

b)

reflection

c)

absorption

d)

transparent

53.
To calculate image size we use.....
a)
actual size x magnification
b)
magnification ÷ actual size
c)
actual size ÷ magnification
54.

What type of lens do you have in your eye?

a)

Concave

b)

Prismatic

c)

Objective

d)

Convex

55.
What does the word "converging" mean?
a)
to separate
b)
to come together
c)
parallel 
d)
perpendicular
56.
What does the word "diverging" mean?
a)
to spread apart
b)
to come together
c)
parallel
d)
perpendicular
57.

Which image CORRECTLY shows how light behaves when it travels from air through glass?

a)
b)
c)
d)
58.

What do a prism, a magnifying glass, a microscope, and eyeglasses ALL have in common.

a)

They are opaque

b)

They refract light

c)

They reflect light

d)

That are translucent

59.

When will total internal reflection occur?

a)

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

b)

When the angle of incidence is smaller than the critical angle

c)

When the angle of incidence is greater than the critical angle

d)

When the light cannot pass through a medium

60.

Zed stands 1.5-m tall in front of a plane mirror. What is the height of his image?

a)

4.5 m

b)

3.0 m

c)

2.0 m

d)

1.5 m

61.

A light ray, travelling parallel to a concave mirror's axis, strikes the mirror's surface. The reflected ray _________.

a)

passes through the mirror's focal point

b)

again travels parallel to the mirror's axis

c)

travels at right angles to the mirror's axis

d)

passes through the mirror's center of curvature

62.

What kind of image is formed by concave lenses?

a)

always real

b)

always virtual

c)

could be real or virtual; depend on the distance of the object from the focal point

d)

could be real or virtual, but always real when the object is placed at the focal point

63.

-

a)

A

b)

B

c)

C

d)

D

64.

-

a)

A

b)

B

c)

C

d)

D

65.

-

a)

A

b)

B

c)

C

d)

D

66.

-

a)

A

b)

B

c)

C

d)

D

67.

-

a)

A

b)

B

c)

C

d)

D

68.

-

a)

A

b)

B

c)

C

d)

D

69.

-

a)

A

b)

B

c)

C

d)

D

70.

-

a)

A

b)

B

c)

C

d)

D

71.

-

a)

A

b)

B

c)

C

d)

D

72.

-

a)

A

b)

B

c)

C

d)

D

73.

Complete the sentence: The angle of incidence is

a)

equal to the angle of reflection.

b)

greater than the angle of reflection.

c)

less than the angle of reflection.

d)

not comparable to the angle of reflection.

74.

What happens when a ray of light goes from a less dense medium into a more dense medium?

a)

It bends towards the normal.

b)

It bends away from the normal.

c)

It passes straight through the medium with no change.

d)

It reflects back at the boundary.

75.

Which of the following best describes the term refractive index?

a)

the number that represents the amount a substance bends light

b)

the number that represents the amount a light ray is reflected

c)

the angle through which light bends

d)

none of the above

76.

Which of the following statements is a reason for using prisms over plane mirrors in a periscope?

a)

The picture will be in colour.

b)

The light is refracted rather than refracted.

c)

The image will be brighter and clearer.

d)

the image will be the same.

77.

Which of the following objects uses mirrors and the law of reflection in order to work?

a)

a periscope

b)

an endoscope

c)

a kaleidoscope

d)

all of the above

78.

Total internal reflection occurs under which conditions?

a)

when the angle of incidence is greater than the critical angle

b)

when the angle of incidence is smaller than the critical angle

c)

when the angle of reflection is greater than the critical angle

d)

when the angle of reflection is smaller than the critical angle

79.

Complete the sentence: Refraction causes light to

a)

bounce off surfaces.

b)

pass through substances with no effect.

c)

change speed.

d)

bend around corners.

80.

Which of the following is a property of waves?

a)

reflection

b)

refraction

c)

diffraction

d)

all of the above

81.

What is the critical angle for glass when the refractive index is 1.45?

a)

52⁰

b)

42⁰

c)

44⁰

d)

34⁰

82.

A ray of light in air enters a glass block. The angle of incidence in air is 30°. The angle of refraction is 20°. What is the refractive index of the glass?

a)

1.00

b)

0.68

c)

1.46

d)

0.17

83.

The refractive index of glass is 1.33. If the angle of incidence is 45°. What is the angle of refraction?

a)

45°

b)

32°

c)

53°

d)

50°

84.

Which of the following is the reason why we see objects?

a)

They reflect light.

b)

They refract light.

c)

They all emit their own light.

d)

They are fluorescing.

85.
The diagram shows a ray of light from one point on a lamp striking a plane mirror. The image of the point on the lamp formed by the mirror is 
a)
at P and is real.
b)
at P and is virtual.
c)
at R and is real.
d)
at R and is virtual. 
86.
A semi-circular block is made from a plastic. A ray of light passes through it at the angles shown. 
 To two decimal places, what is the refractive index of the plastic?
a)
1.25
b)
1.41
c)
1.51
d)
1.61 
87.

 What is the angle of refraction at the critical angle?

a)

Less than 43

b)

Equal to 43

c)

More than 43 but less than 90

d)

Equal to 90 degrees

88.
Section B1a
Given that the angle of incidence = 30 degrees
a. Draw a ray diagram, labelling clearly the normal, incident ray, angle of incidence, reflected ray and angle of reflection accurately.
Which is the correct diagam? 
a)
A
b)
B
c)
C
d)
D
89.

If a capital letter R is seen in an ordinary mirror, what does it look like?

a)

A

b)

B

c)

C

d)

D

90.

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

91.
A ray of light passes through a window. Which path does it take? 
a)
A
b)
B
c)
C
d)
D
92.
The diagram shows the image of a clock in a plane mirror. What time is shown?
a)
02:25 
b)
02:35 
c)
09:25 
d)
09:35 
93.
 A parallel beam of light falls on a converging lens. Which diagram shows what happens to the beam of light? 
a)
A
b)
B
c)
C
d)
D
94.
A man sees a stone at the bottom of a pool of water. Which path could be taken by light from the stone to the man? 
a)
A
b)
B
c)
C
d)
D
95.
Which colour, red or blue, has the higher frequency and which has the longer wavelength? 
a)
higher frequency: blue
longer wavelength: blue
b)
higher frequency: blue
longer wavelength: red
c)
higher frequency: red
longer wavelength: blue
d)
higher frequency: red
longer wavelength: red
96.
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
97.
The angle produced as a source of light bounces off a reflecting surface is called ______.
a)
angle of crookedness
b)
angle of reflection
c)
angle of incidence
d)
angle of bounce
98.

MCQ 011

According to the law of reflection, if i = angle of incidence and r = angle of reflection,

a)

i = r

b)

i > r

c)

r > i

d)

i is not equal to r

99.
The velocity of light in vacuum is _______ m/s
a)
3x108
b)
3x1012
c)
3x106
d)
3x1010
100.
How does light behave as it enters these mediums?
a)
continue its path as straight line.
b)
bends toward the normal
c)
bends away from the normal
d)
reflects
101.
What is this called?
a)
refraction
b)
reflection
c)
reconstroction
d)
retraction
102.

Optical fibre based on the principle of

a)

total internal reflection.

b)

total internal refraction.

c)

diffraction.

d)

interference.

103.

A ray of light travels from air into glass at an incident angle of 30o. Find the angle of refraction. (The refractive index of glass is 1.5)

a)

19.7o

b)

19o

c)

19.5o

d)

19.3o

104.

A ray of light enters air from glass. The angle of incidence is 35o and the angle of refraction is 69o. Find the refractive index of the glass.

a)

1.62

b)

1.63

c)

1.64

d)

1.65

105.

What electromagnetic wave . has . the shortest wavelengths and the highest frequencies?

a)

Gamma Rays

b)

Ultraviolet Rays

c)

Radio Waves

d)

X Rays

106.

What happens to wavelength as the frequency of a wave increases?

a)

increase

b)

stays the same

c)

decreases

d)

becomes faster

107.

The human eye is only capable of seeing which electromagnetic wave?

a)

Infrared Light

b)

Ultraviolet Light

c)

Visible Light

d)

All of the above

108.

What electromagnetic wave do humans emit as heat energy?

a)

infrared light

b)

ultraviolet light

c)

visible light

d)

microwaves

109.

Which of the following is correct in order from lowest to highest energy?

a)

X Rays, Visible Light, Microwave

b)

Ultraviolet, Visible Light, Gamma-Rays

c)

Microwave, Visible Light, Gamma Rays

110.

Which type of electromagnetic wave has the longest wavelength?

a)

visible light

b)

radio waves

c)

ultraviolet waves

d)

gamma rays

111.
Link between wave speed, wave length and frequency
a)
wave speed = wave length x frequency
b)
wave speed = frequency / wave length
c)
wave speed = wave length / frequency
d)
wave speed = wave speed x frequency
e)
wave speed = frequency / wave speed
112.
Link between refractive index (n), angle of incidence (i) and angle of refraction (r)
a)
n = sin i / sin r
b)
n = i / r
c)
n = sin i / r
d)
n = i / sin r
e)
n = sin r / sin i
113.
Link between refractive index (n) and critical angle
a)
n = 1 / sin c
b)
n = sin c / 1
c)
n = 1 / c
d)
n = c / sin 1
e)
n = c
114.

Select the two that show Refractive index of a material

a)

Refractive index = speed of light in vacuum x speed of light in material

b)

Refractive index = speed of light in vacuum / speed of light in material

c)

n = v1 / v2

d)

n = v1 x v2

115.

Dispersion of light referred to as________.

a)

Bending of light

b)

Splitting of light in seven colours

c)

Splitting of light in primary colours

d)

Bouncing back of light

116.

the bending of light

a)

refraction

b)

reflection

c)

absorption

d)

transparent

117.
When an object is placed between the focal point and the convex lens, the image produced is ___.
a)
real, reduced, and inverted
b)
real, enlarged, and inverted
c)
virtual, enlarged, and upright
d)
virtual, reduced, and upright
118.
The point where the rays meet is known as....
a)
Fire
b)
the focal point
c)
refraction
d)
Plane of the lens
119.
This image is.....
a)
inverted and smaller
b)
inverted and larger
c)
not inverted and smaller
d)
not inverted and larger
120.
This image is...
a)
Inverted and smaller
b)
inverted and bigger
c)
not inverted and smaller
d)
not inverted and bigger
121.
a real image...
a)
is produced by virtual rays and can be projected on a screen
b)
is produced by real rays and cannot be projected on a screen
c)
is produced by virtual images and cannot be projected on a screen
d)
is produced by real rays and can be projected on a screen
122.
Which describes a convex lens?
a)
triangular in shape
b)
more transparent in the middle
c)
thicker on the edges than in the middle
d)
thicker in the middle than on the edges
123.

What type of image is formed?

a)

virtual and inverted

b)

virtual and upright

c)

real and upright

d)

real and inverted

124.

What happens above the critical angle?

a)

Diffraction

b)

Reflection

c)

Total Internal Reflection

d)

Refraction

125.

What is the name we give F?

a)

Principle focus

b)

Axis

c)

Focal length

d)

Image

126.

Which words below best describe the image formed?

a)

virtual, inverted, magnified

b)

real, inverted, same size

c)

real, upright, same size

d)

virtual, upright, diminished

127.

Apart from being virtual, what else is this image?

a)

magnified, inverted

b)

magnified, upright

c)

upright, diminished

d)

upright, same size

128.
A ray of light is reflected by two parallel plane mirrors X and Y.  Which statement is correct? 
a)
The angle of incidence at mirror X is 30°.
b)
The angle of incidence at mirror Y is 60°.
c)
The angle of reflection at mirror X is 120°.
d)
The angle of reflection at mirror Y is 0°. 
129.
An eye views an object O by reflection in a plane mirror. Which is the correct ray diagram? 
a)
A
b)
B
c)
C
d)
D
130.
The diagram shows a ray of light from one point on a lamp striking a plane mirror. The image of the point on the lamp formed by the mirror is 
a)
at P and is real.
b)
at P and is virtual.
c)
at R and is real.
d)
at R and is virtual. 
131.
A semi-circular block is made from a plastic. A ray of light passes through it at the angles shown. 
 To two decimal places, what is the refractive index of the plastic?
a)
1.25
b)
1.41
c)
1.51
d)
1.61 
132.

Light is an example of a transverse wave

a)

True

b)

False

133.

The critical angle in the diagram is 43 degrees. What is the angle of refraction at the critical angle?

a)

Less than 43

b)

Equal to 43

c)

More than 43 but less than 90

d)

Equal to 90 degrees

134.
Section B1a
Given that the angle of incidence = 30 degrees
a. Draw a ray diagram, labelling clearly the normal, incident ray, angle of incidence, reflected ray and angle of reflection accurately.
Which is the correct diagam? 
a)
A
b)
B
c)
C
d)
D
135.

If a capital letter R is seen in an ordinary mirror, what does it look like?

a)

A

b)

B

c)

C

d)

D

136.

This reflection is

a)

specular.

b)

diffuse.

137.

Images in a plane mirror are

a)

real

b)

larger

c)

same size

d)

smaller

138.

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

139.

You are able to see the road cone in the picture because

a)

orange light travels faster than any other light

b)

the orange light was absorbed into the cone and all other colours were reflected

c)

the orange light was reflected and all other colours were absorbed

d)

only orange light struck the road cone

140.

If v is the speed of light in a medium and c is the speed of light in vacuum, the formula to calculate the refractive index (n) of a medium is

a)

n=cv

b)

n=v/c

c)

n=c/v

d)

v=nc

141.
Absolute refractive index of any medium is always _______.
a)
less than 1
b)
greater than 1
c)
1
d)
0
142.
Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
143.

What happens to the frequency of a light wave as it propagates from glass into air?

a)

It remains constant.

b)

It slows down.

c)

It speeds up.

d)

It bends.

144.

A light ray containing two different wavelengths is incident at a cetain angle on a block of glass. What color can be associated with the refracted rays 𝒓𝟏 and 𝒓𝟐 respectively according to the figure shown below?

a)

r1 = red r2 = blue

b)

r1 = red r2 = yellow

c)

r1 = green r2 = red

d)

r1 = green r2 = violet

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