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Worksheets

REVISION QUIZ

Total questions: 134

Worksheet time: 3hrs 49mins

Name
Class
Date
1.

What is the far point for human eye?

(a)  

2.

What is the near point for human eye?

(a)  

3.

•To see nearby objects,the ciliary muscle ---------and the eye lens become -------

(a)  

4.

•The ability of eye to see far as well as near by objects is called (a)  

5.

Which part of eye is responsible for eye colour ?

(a)  

6.

Which type of lenses are used in upper and lower part?

(a)  

7.

label 3

(a)  

8.

Rods distinguish colours and cones distinguish bright and dim light.

a)

true

b)

false

9.

Identify the defect and how it is corrected?

a)

Myopia ,convex lens

b)

Myopia ,concave lens

c)

Hypermetropia ,convex lens

d)

Hypermetropia ,convex lens

10.

-------- is corrected by using convex lens.

(a)  

11.

label 4

(a)  

12.

This defect is caused due to elongation of eye ball.

(a)  

13.

Convex lens is used to correct this defect.

(a)  

14.

bifocal lens is used to correct this defect.

a)

Myopia

b)

hypermetropia

c)

cataract

d)

presbyopia

15.

this defect is also known as old age defect.

(a)  

16.

this problem arises due to foggy or cloudy lens .

a)

presbyopia

b)

myopia

c)

cataract

d)

hypermetropia

17.

which colour bends the most on refraction through a triangular prism?

a)

red

b)

blue

c)

green

d)

violet

18.

This phenomenon is responsible for rainbow formation.

a)

refraction

b)

dispersion

c)

internal reflection

d)

all of these

19.

angle of deviation in a triangular prism is angle between

a)

incident ray and refracted ray.

b)

refracted ray and emergent ray.

c)

extended incident and emergent ray

d)

none of these

20.

The type of lens present in the human eye is.........

a)

concave lens

b)

convex lens

c)

concavo-convex

d)

plane lens

21.

Nature of the image formed on the retina ...........

a)

real and erected

b)

virtual and inverted

c)

virtual end erect

d)

real and inverted

22.

If a student cannot see the black board clearly even in sitting in the first bench. The type of defect of his eye is ........

a)

Myopia

b)

hypermetropia

c)

presbyopia

d)

cataract

23.

When a white light falls on a triangular prism, the colour of light which will deviate the least is

a)

violet

b)

green

c)

blue

d)

red

24.

Which of the following is the best example of white light?

a)

Danger signals

b)

laser light

c)

sun light

d)

sodium lamp

25.

Formation of rainbow is due to..........

a)

refraction of light

b)

scattering of light

c)

dispersion of light

d)

atmospherics refraction

26.

Atmospherics refraction explains the natural phenomena

a)

twinkling of stars

b)

Sky appears blue

c)

Refraction of light through a prism

d)

rainbow formation

27.

Assertion: Planets do not twinkle

Reason: Light rays do not come from planet

a)

Assertion and reason are true. Reason is the correct explanation of Assertion

b)

Assertion and reason are false

c)

Assertion is false, but reason is true

d)

Assertion is true, but reason is false

28.

Advanced sunrise and delayed sunset is due to

a)

Scattering of light

b)

Atmospheric refraction

c)

dispersion of light

d)

reflection of light

29.

The angle between angle of incidence and the angle of emergence is called...........

a)

angle of emergence

b)

angle of prism

c)

angle of deviation

d)

critical angle

30.

When white light enters a prism, it gets split into its constituent colours. This is due to

a)

different refractive index for different wavelength of each colour

b)

each colours has same velocity in the prism.

c)

prism material have high density.

d)

Scattering of light

31.

The air layer of atmosphere whose temperature is less then the hot layer behave as optically

a)

denser medium

b)

rarer medium

c)

inactive medium

d)

either denser or rarer medium

32.

The deflection of light by minute particles and molecules of the atmosphere in all direction is called ____________ of light.

a)

scattering

b)

interference

c)

tyndell effect

d)

Reflection

33.

At noon the sun appears white as [NCERT Exemplar Problems]

a)

light is least scattered

b)

all the colours of the white light are scattered away

c)

blue colour is scattered the most

d)

red colour is scattered the most

34.

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

a)

moves fastest in air

b)

is absorbed the most by smoke or fog

c)

is scattered the least by smoke or fog

d)

is scattered the most by smoke or fog

35.

Scattering of light by colloidal solution is known as

a)

Scattering

b)

Dispersion

c)

Tyndall effect

d)

Stability

36.

The colored light that refracts most while passing through a prism is

a)

Red

b)

Yellow

c)

Blue

d)

Violet

37.

Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?

a)

Rainbow

b)

Twinkling of stars

c)

Advanced sunrise and delayed sunset

d)

Stars seem higher than they actually are

38.

The depth of a pond when seen from above appears to be less.

a)

True

b)

False

39.

The incident ray refracted ray and normal all lie in the same plane.

This law is called Snell's law of refraction.


When light travels from air to glass:

a)

the angle of incidence > angle of refraction

b)

the angle of incidence < angle of refraction

c)

the angle of incidence = angle of refraction

d)

can't say

40.

A lens is a piece of transparent material bounded by two curved surfaces. There are two types of lenses convex lens and concave lens.


A small bulb is placed at the focal point of a converging lens. When the bulb is switched on, the lens produces

a)

a convergent beam of light

b)

a divergent beam of light

c)

a parallel beam of light

d)

a patch of colored light

41.

The refractive index of glass is maximum for (a)   light.

42.

In which of the following cases will no dispersion takes place when sunlight passes through it

a)

a

b)

b

c)

c

d)

d

43.

Twinkling of stars is due to atmospheric

a)

dispersion of light by water droplets

b)

refraction of light by different layers of varying refractive indices

c)

scattering of light by dust particles

d)

internal reflection of light by clouds.

44.

The clear sky appears blue because

a)

blue light gets absorbed in the atmosphere.

b)

ultraviolet radiations are absorbed in the atmosphere.

c)

violet and blue lights get scattered more than lights of all other colours by the atmosphere

d)

light of all other colours is scattered more than the violet and blue colour lights by the atmosphere.

45.

Why does the straw appear to be bent?

a)

light is reflected

b)

light is absorbed

c)

light is turned

d)

light is refracted

46.
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
47.

When white light enters a prism, it gets split into its constituent colours. This is due to

a)

different refractive index for different wavelength of each colour

b)

each colours has same velocity in the prism.

c)

prism material have high density.

d)

Scattering of light

48.

The deflection of light by minute particles and molecules of the atmosphere in all direction is called ____________ of light.

a)

scattering

b)

interference

c)

tyndell effect

d)

Reflection

49.

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

a)

moves fastest in air

b)

is absorbed the most by smoke or fog

c)

is scattered the least by smoke or fog

d)

is scattered the most by smoke or fog

50.

When a white light falls on a triangular prism, the colour of light which will deviate the least is

a)

violet

b)

green

c)

blue

d)

red

51.

Advanced sunrise and delayed sunset is due to

a)

Scattering of light

b)

Atmospheric refraction

c)

dispersion of light

d)

reflection of light

52.
Why does the lower part of the child appear so much different in size from the upper part?
a)
The light rays that travel through water and then into air are refracted.
b)
The light rays that travel through water and then into air are enlarged.
c)
The light rays that travel through air and then into water are reflected.
d)
The light rays that travel through air and then into water are reduced.
53.

What is the time difference between actual sunset and apparent sunset ?

a)

2 seconds

b)

20 seconds

c)

2 minutes

d)

20 minutes

54.

Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?

a)

Rainbow

b)

Twinkling of stars

c)

Advanced sunrise and delayed sunset

d)

Stars seem higher than they actually are

55.

When white light passes through a prism,

a)

red bends more, violet bends least

b)

red bends least, violet bends most

c)

dispersion doesn't occur

d)

refraction doesn't occur

56.

The splitting of white light into the seven colors when it passes through a transparent material is called

a)

Refractrion

b)

Dispersion

c)

Reflection

d)

Diffraction

57.
What is happening in this picture?
a)
The water is making the pencil bigger
b)
the water is refracting (bending) the pencil
c)
the water is refracting (bending) the light to make the pencil look bent
d)
light is being absorbed
58.
Which images are opaque?
a)
A & C
b)
A,C,E, & F
c)
D, E, & F
d)
A & E
59.
What is being blocked when a shadow is formed?
a)
Light Source
b)
Light Path
c)
Object
d)
Eye
60.

Why is the component of color in a rainbow can be seen when light passes through a glass prism?

a)

phenomena of scattering of light

b)

phenomena of dispersion of light

c)

phenomena of reflection of light

d)

phenomena of diffraction of light

61.

Why is the spectrum of light separated into its components of color when white light is directed to a prism?

a)

Because light reflects off the prism's surface

b)

The incident white light refracts and separates into its constituent colors

c)

The white light is absorbed by the prism, separating its colors

d)

The light speeds up as it moves from air into the denser plastic material

62.

Look at the diagram given. This is the first prism. What happen if A SECOND inverted prism is placed behind the first prism?

a)

the various colors pass through it and form brighter spectrum

b)

the various colors pass through it and form a white light back

c)

the various colors pass through it and form an opposite spectrum colors

d)

nothing will happen

63.

This is the example of dispersion of light

a)

sky looks bright orange in the evening

b)

shadow

c)

Pool seems shallower

d)

rainbow

64.

these are examples of phenomenon of scattering of light except

a)

Sky appears blue at midday

b)

Sky appears reddish in the evening

c)

Rainbow after rain

65.

Why does scattering of light occur?

a)

Light rays are reflected by atmospheric molecules and scatter in all directions

b)

Light rays are blocked and refracted to all directions by the clouds or particles in the air

c)

Light rays are transmitted and refracted in all directions by the clouds or particles in the air

66.
What is the difference between reflection and refraction? 
a)
Both involve light bending through a medium
b)
Reflection is light bouncing off a medium's surface and refraction is light bending through a medium
c)
Reflection is light bending through a medium's surface and refraction is light bouncing off a medium
d)
Refraction is light being absorbed in a medium and reflection is light being bent through a different medium
67.

Name the light phenomenon above.

a)

Reflection

b)

Refraction

c)

Dispersion

d)

Scatteting

68.

Which of the following is example light scattering ?

( There CAN be more than 1 answer)

a)
b)
c)
d)
69.

Which of the following natural phenomenons occur due to light dispersion.

a)
b)
c)
d)
70.

Stars appear to be higher in the sky than actually they are because of

a)

Scattering of light

b)

Atmospheric refraction

c)

Dispersion

d)

Recombination of light

71.

Which statement is true?

a)

Red light moves fastest

b)

Blue light moves faster than green light

c)

All the colors of white light move with same speed

d)

Yellow light moves with the mean speed as that of red and violet light

72.

We can see the sun before the actual sunrise about

a)

5 mins

b)

2 mins

c)

4 mins

d)

1 min

73.

As light from a far off star comes down towards the earth

a)

it bends away from the normal

b)

it bends towards the normal

c)

it does not bend

d)

it is reflected back

74.

The stars twinkle but the planets do not twinkle at night because

a)

The stars are small but the planets are large

b)

The stars are large but the planets are small

c)

The stars are much nearer but the planets are far away

d)

The stars are far away but the planets are much nearer

75.

Did you understand all the topics

a)

yes

b)

no

c)

only some

76.

What type of lens is wider in the middle than on the edges?

a)

Concave

b)

Convex

c)

Objective

d)

Ocular

77.

When light passes through a convex lens, it does this.....

a)

Diverge, or spread apart

b)

Converge, or come together

c)

Reflect, or bounce off

d)

Create a rainbow

78.

The point at which light rays converge after passing through a convex lens is called what.

a)

The Horizon Point

b)

The Point Break

c)

The Focal Point

d)

The Perspective

79.

When light waves move from passing through air to passing through a glass lens when happens to them?

a)

They slow down and change direction

b)

They speed up and change direction

c)

They maintain the same speed and change direction

d)

They maintain their same speed and direction

80.

What type of lens do you have in your eye?

a)

Concave

b)

Prismatic

c)

Objective

d)

Convex

81.

The angle of the incoming rays of light are also called the.....

a)

Angle of reflection

b)

Angle of refraction

c)

Angle of incidence

d)

Wave angle

82.

The distance between a convex lens and its focal point is called what?

a)

The focus

b)

The focal length

c)

The wave length

d)

The amplitude

83.

The thicker the convex lens, the ___________________ its focal length.

a)

Shorter

b)

Longer

c)

Thicker

d)

Thinner

84.

The thicker the convex lens, the ___________________ its focal length.

a)

Shorter

b)

Longer

c)

Thicker

d)

Thinner

85.

As light passes from air into water it ________________________.

a)

speeds up

b)

continues at the same speed

c)

slows down

d)

forms a mirage

86.

Which lens is concave?

a)

a

b)

b

87.

Which lens can produce a real image?

a)

a

b)

b

88.

Which lens always produces an image that is upright?

a)

a

b)

b

89.

Which lens is the type of lens that is used in a hand lens?

a)

a

b)

b

90.

The best definition of refraction is ____.

a)

passing through a boundary

b)

bouncing off a boundary

c)

changing speed at a boundary

d)

changing direction when crossing a boundary

91.
Which color is good absorber of heat?
a)
Black
b)
Yellow
c)
White
92.
How much time does sunlight take to reach from sun to earth?
a)
8 sec
b)
8 min
c)
8 hour
d)
1 min
93.
A car has a convex mirror as its side mirror of focal length 30 cm. A second car is 5m behind the first car. Find the position of the second car as seen in the mirror of first car.
a)
0.32 m
b)
0.28 m
c)
0.64 m
d)
0.78 m
94.
A man uses lens of power +2.0 D in his spectacles. His son takes out the lens from the spectacles and keeps it between a small pencil and a wall. He observes an inverted image on the wall, which has the same size as the pencil.
a)
50 cm
b)
75 cm
c)
100 cm
d)
150 cm
95.
A student placed a pencil in a cup of water.  The pencil appears broken because light-
a)
always travels in a straight line
b)
bends when it passes through water
c)
makes the water in the glass evaporate
d)
reflects the pencil on the water's surface
96.

The radius of curvature of a convex lens is 20cm. What is its focal length?

a)

10 cm

b)

20 cm

c)

30 cm

d)

40 cm

97.

Name the type of mirrors used in the following situations:

(i) Used by Dentist.

(ii) Rear-view mirror of vehicle

a)

(i) Diverging mirror

(ii) Converging mirror

b)

(i) & (ii) Both Converging mirror

c)

(i) Converging mirror

(ii) Diverging mirror

d)

(i) & (ii) Both Diverging mirror.

98.

In the given ray diagram, which of the following path of the refracted ray is correct?

a)
b)
c)
d)
99.

An object is kept at a distance of 4m in front of a spherical mirror, which forms its erect image at a distance of 1m

from the mirror. What is the magnification? Is the mirror concave or convex?

a)

m = +4

Concave Mirror

b)

m = -4

Convex mirror

c)

m = - 1/4

Convex Mirror

d)

m = +1/4

Convex Mirror

100.

A concave mirror produces a three times magnified image on a screen. If the object is placed 20cm in front of the mirror, What is the image distance?

a)

-20 cm

b)

-40cm

c)

-60 cm

d)

-10 cm

101.

Calculate the power of a lens whose focal length is +40 cm. Also Identify the nature of the lens.

a)

P = +0.25 D

Concave lens.

b)

P = +2.5 D

Convex lens

c)

P = +0.25 D

Concave lens

d)

P = +2.5 D

Convex Lens

102.

Complete the path of the refracted ray of the given incident light on the given convex lens.

a)
b)
c)
d)
103.

The image of a candle flame placed at a distance of 30cm from a mirror is formed on a screen placed in front of the mirror at a distance of 60cm from its pole. What is the nature of the mirror? Find its focal length.

a)

F = - 20 cm

Concave Mirror

Real & Inverted Image

b)

F = + 20 cm

Concave Mirror

Virtual & Erect Image

c)

F = - 20 cm

Convex Mirror

Real & Inverted Image

d)

F = + 20 cm

Convex Mirror

Virtual & Erect Image

104.

A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.

a)

Plane, convex and concave

b)

Convex, concave and plane

c)

Concave, plane and convex

d)

Convex, plane and concave

105.

The refractive indices of glass and water with respect to air are 3/2 and 4/3 respectively. If the speed of light in glass is 2 x 108 m/s, find the speed of light in water.

a)

0.5 x 108 m/s

b)

3 x 108 m/s

c)

2.25 x 108 m/s

d)

2 x 108 m/s

106.

A concave lens has focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? Also, find the magnification.

a)

u = + 30 cm

m = - 0.33

b)

u = + 20 cm

m = - 1.33

c)

u = - 20 cm

m = + 1.33

d)

u = - 30 cm

m = + 0.33

107.

A convex mirror used for rear view on an automobile has a radius of curvature of 3 m. If a bus is located at 5 m from this mirror. Find out the position, nature and size of the image.

a)

v = - 1.15 m

m = - 0.23

Virtual & Erect

b)

v = - 1.5 m

m = + 0.23

Real & Inverted

c)

v = + 1.5 m

m = + 2.3

Real & Inverted

d)

v = + 1.15 m

m = + 0.23

Virtual & Erect

108.

An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the nature, size and position of the image formed.

a)

v = - 6 cm

m = - 0.6

Real & Inverted

b)

v = + 6 cm

m = + 0.6

Virtual and Erect

c)

v = - 6 cm

m = - 0.6

Virtual and Erect

d)

v = + 6 cm

m = + 0.6

Real & Inverted

109.

Which of the following lenses would you prefer to use while reading small letters of newspaper?

a)

A convex lens of focal length 50 cm.

b)

A concave lens of focal length 5 cm.

c)

A concave lens of focal length 50 cm.

d)

A convex lens of focal length 5 cm.

110.

An object 5 cm in size is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 40 cm. Find out the position, size and nature of the image formed.

a)

v = + 10 cm

h' = + 2.5 cm

Virtual, Erect and smaller in size.

b)

v = - 20 cm

h' = - 0.5 cm

Real, Inverted and enlarge in size.

c)

v = + 20 cm

h' = + 0.5 cm

Real, Inverted and enlarge in size.

d)

v = - 10 cm

h' = - 2.5 cm

Virtual, Erect and smaller in size.

111.

A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Also calculate the size of the image formed.

a)

u=-60; h' =(5/4)

b)

u=-60; h' =(4/5)

c)

u= +60; h' =(5/4)

d)

u=+60; h' =(4/5)

112.

A concave mirror of focal length 20 cm forms an image having twice the size of object. For the virtual position of object, the position of object will be at:

a)

25 cm

b)

40 cm

c)

10 cm

d)

At infinity

113.

If a man’s face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be:

a)

75 cm

b)

25 cm

c)

15 cm

d)

60 cm

114.

The refractive index of water is 1.33. The speed of light in water will be:

a)

1.33 × 10^8 m/s

b)

3 × 10^8 m/s

c)

2.66 × 10^8 m/s

d)

2.26 × 10^8 m/s

115.

You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is

a)

A

b)

B

c)

C

d)

Equal in all media

116.

A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

a)

-10 cm

b)

20 cm

c)

-30 cm

d)

-40 cm

117.

Which of the following statements is/are true?

a)

A convex lens has 4 dioptre power having a focal length 0.25 m

b)

A convex lens has -4 dioptre power having a focal length 0.25 m

c)

A concave lens has 4 dioptre power having a focal length 0.25 m

d)

A concave lens has – 4 dioptre having a focal 0.25 m

118.

A point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm. The image will form at:

a)

at infinity

b)

at focus

c)

at pole

d)

behind the mirror.

119.

If the power of a lens is – 2 D, what is its focal length?

a)

+50 cm

b)

-100 cm

c)

-50 cm

d)

+100 cm

120.

A ray of light is travelling from a rarer medium to a denser medium. While entering the denser medium at the point of incidence, it:

a)

goes straight into the second medium

b)

bends towards the normal

c)

bends away from the normal

d)

does not enter at all

121.

The above lens is a type of ___.

a)

diverging lens

b)

converging lens

c)

divergent lens

d)

convergent lens

122.

Which lens represents the path light takes through a diverging lens?

a)
b)
c)
d)
123.

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

a)
b)
c)
d)
124.

Which optical device bends light inward?

a)

convex lens

b)

concave lens

c)

plane mirror

d)

convex mirror

125.

What type of lens is wider in the middle than on the edges?

a)

Concave

b)

Convex

c)

Objective

d)

Ocular

126.

When light passes through a convex lens, it does this.....

a)

Diverge, or spread apart

b)

Converge, or come together

c)

Reflect, or bounce off

d)

Create a rainbow

127.

The distance between a convex lens and its focal point is called what?

a)

The focus

b)

The focal length

c)

The wave length

d)

The amplitude

128.

What type of lens do you have in your eye?

a)

Concave

b)

Prismatic

c)

Objective

d)

Convex

129.

The angle of the incoming rays of light are also called the.....

a)

Angle of reflection

b)

Angle of refraction

c)

Angle of incidence

d)

Wave angle

130.

The thicker the convex lens, the ___________________ its focal length.

a)

Shorter

b)

Longer

c)

Thicker

d)

Thinner

131.

Which lens always produces an image that is upright?

a)

a

b)

b

132.
A student placed a pencil in a cup of water.  The pencil appears broken because light-
a)
always travels in a straight line
b)
bends when it passes through water
c)
makes the water in the glass evaporate
d)
reflects the pencil on the water's surface
133.

What type of lens is used in the shown instrument?

a)

concave lens

b)

convex lens

c)

reflection lens

d)

reduction lens

134.
A man uses lens of power +2.0 D in his spectacles. His son takes out the lens from the spectacles and keeps it between a small pencil and a wall. He observes an inverted image on the wall, which has the same size as the pencil.
a)
50 cm
b)
75 cm
c)
100 cm
d)
150 cm

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