Light Questions

We provide light practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on light skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.

Light Questions

List of light Questions

Question NoQuestionsClass
1An insect is sitting in front of a plane
mirror at a distance 1 m from it.
(a) Where is the image of the insect
formed?
(b) What is the distance between the
insect and its image?
( mathbf{A} cdot(a) 2 m ) behind the mirror ( (b) 1 m )
B. ( (a) 2 m ) infront of the mirror
( (b) 1 m )
C ( .(a) 1 m ) infront of the mirror
( (b) 2 m )
D. ( (a) 1 m ) behind the mirror
( (b) 2 m )
7
2Two plane mirrors are placed such they
make ( 0^{circ} ) angle with each other .How many images, of an object placed between them, are formed?
( A cdot O )
B. 2
( c )
D. Infinite
8
3Two plane mirrors ( A ) and ( B ) are aligned parallel to each other, as shown in the figure A light ray is incident at an angle
( 30^{circ} ) at a point just inside one end of ( A ) The plane of incidence coincides with
the plane of the figure The maximum
number of times the ray undergoes reflections (including the first one ) before it emerges out is
( A cdot 30 )
B. 3
( c cdot 32 )
( D cdot 34 )
8
4Periscope can not be made with
A. single mirror
B. 2 mirrors
c. 3 mirrors
D. 4 mirrors
8
5A point object is placed at distance of ( 20 mathrm{cm} ) from a lens as shown in figure.
The position of final image from the
lens is
7
6An incident ray passing through the focus will be reflected:
A. straight away
B. through the pole of the mirror
c. back and passes through the centre of curvature
D. parallel to the principal axis
7
7If a mirror forms a virtual image of a
real object then
A. it must be a convex mirror.
B. it must be concave mirror.
c. it must be a plane mirror.
D. it may be any of the mirrors mentioned above
7
8A device for producing highly intense and coherent (wave in same phase) beam of light is called
A. laser
B. maser
c. search light
D. none of these
7
9The perpendicular drawn at the point of incidence on a mirror is called:
A. incident ray
B. reflected ray
c. normal
D. image
7
10How is the phenomenon of reflection used in making a kaleidoscope? What are the applications of a kaleidoscope?8
11Choose the incorrect statement related
to the image formed by a plane mirror:
This question has multiple correct options
A. a plane mirror always forms a virtual image
B. the image formed by a plane mirror may be magnified or diminished
C. the image formed by a plane mirror is always unmagnified and laterally inverted
D. the image formed by a plane mirror is always unmagnified and erect
7
12The image formed by a plane mirror is :
A. at the same distance behind the mirror as the object is in front of it
B. Iaterally inverted
c. of the same size as that of the object
D. all of the above
7
13Two mirrors M1 and M2 are placed at right angle to each others as shown. The total number of images of an object ‘O’
that can be seen are
A. Two
B. Three
( c . ) Four
D. Infinite
8
14( frac{4}{4} )8
15Two plane mirrors are inclined to each
other with their reflecting faces making acute angle. A light ray is incident on one plane mirror. The total deviation
after two successive reflections is
This question has multiple correct options
A. independent of the initial angle of incidence
B. independent of the angle between the mirrors
c. dependent on the initial angle of incidence
D. dependent on the angle between the mirrors
8
16The image formed by a plane mirror is
the object.
( mathbf{A} )
A. smaller than
B. bigger than
C. of the same size as
D. cannot be determined
7
17A pole ( 5 mathrm{m} ) high is situated on a horizontal surface. Sun rays are
incident at an angle ( 30^{circ} ) with the
vertical. What will be the size of shadow
on horizontal surface
8
18State which surface of a plane mirror reflects most of the light incidents on it:
the front smooth surface or the back
silvered surface?
A. Back silvered surface
B. Front smooth surface
c. Both refract equally
D. Both reflect no light
7
19Which of the following is not the case with image formed by a plane mirror:
A. It is erect
B. It is virtual
c. It is diminished
D. It is at the same distance as the object
7
20Two plane mirrors are parallel to each other and spaced ( 20 mathrm{cm} ) apart. ( mathrm{A} ) luminous point is placed between them at a distance ( 5 mathrm{cm} ) from one mirror
Determine the distances of the first
nearest images from each other.
A . 10
B. 70
( c .35 )
D. 40
8
21Two parallel plane mirrors placed facing each other forms ( infty ) images of an
object. Does this hold good, if they are placed at an angle ( boldsymbol{theta} neq mathbf{0} ? )
A. Yes
B. No
c. only if angle is of the form ( theta=pi / n, n=1,2,3 dots )
D. only if angle is of the form ( theta neq pi / n, n=1,2,3 dots )
8
22Why there are two parallel plane mirrors
in a barber shop?
A. Two parallel plane mirrors form infinite images.
B. The customer can see the image of back of his head with the help of this setup.
C. The setup focusses light and helps the barber to cut the hair better.
D. None of the above.
8
23Assertion
When an object is placed between two plane parallel mirrors, then all the images found are of equal intensity.
Reason

In case of plane parallel mirrors, only two images are possible.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect

8
24When a divergent beam of light is incident on a plane mirror, the image formed is
A. Upright and real
B. Upright and virtual
c. Inverted and virtual
D. Inverted and real
7
25The idea of multiple images formed by plane mirrors is used in:
A . a periscope
B. a kaleidoscope
c. a telescope
D. all the above
8
26Why is it difficult to read the image of the text of a page formed due to reflection by plane mirror?
A. Due to lateral inversion
B. It is virtual
c. Due to reflection
D. No difficulty
7
27A plane mirror is moving in a circle in front of a stationary point object 0 as shown in fig. Then path of image of object is:
A . circle
B. straight line.
c. ellipse
D. parabolic.
7
28In case of plane mirror, the size of the image is equal to the size of the object, irrespective of the distance of the object from the mirror.
A . True
B. False
7
29Image of an object is seen in a plane
mirror, the distance from the mirror to
the image depends on
A. The wavelength of light
B. The distance of the object from the mirror
c. The distance of both the observer and the object to the mirror
D. The thickness of the mirror
7
30An object is placed at a distance of ( 0.25 m ) in front of a plane mirror. The distance between the object and the
image is:
A. ( 0.5 m )
в. ( 1 m )
c. ( 0.25 m )
D. ( 0.75 m )
7
31No matter how far you stand from a mirror, your image always appears erect. The mirror is likely to be:
A. Plane
B. Concave
c. Both A and B
D. None
7
32What creates a colorful pattern through light entering the other end of Kaleidoscope?
A. Refraction from mirrors
B. Reflection from mirrors
c. Diffraction from mirrors
D. Deviation from mirrors
8
33How many images of a candle will be formed if it is placed between two
parallel plane mirrors separated by 40 ( mathrm{cm} ? )
8
34Amount of light reflected depends upon
A. Nature of material of the object
B. Nature of the surface
c. Smoothness of the surface
D. All of these
7
35If an object is placed symmetrically between two plane mirrors inclined at
an angle of ( 72^{circ}, ) then the total number of
images formed is:
A . 5
B. 4
( c cdot 2 )
D. Infinite
8
36The reflected ray from a plane mirror is incident on another plane mirror which is placed perpendicular to the first. If the angle of incidence on the first mirror
is ( 30^{0}, ) determine the glancing angle of
reflection on the second mirror
A . ( 15^{circ} )
B . ( 120^{circ} )
( c cdot 60^{circ} )
D. ( 30^{circ} )
8
37An object is kept in front of three mutually perpendicular mirrors. Then the total number of images is.8
38If incident ray CA and reflected ray BD
are parallel to each other. Find the angle
of inclination between the mirrors.
A ( cdot i_{1}+i_{2}=theta )
B. ( i_{1}+i_{2}=frac{1}{2} theta )
( mathbf{c} cdot i_{1}+i_{2}=2 theta )
( D cdot ) none
8
39( frac{w}{h} )7
40Artists use KALEIDOSCOPE for
A. Entertaining themselves
B. Getting ideas for new patterns
c. Discovering new properties of light
D. None of these
8
41Two mirrors are inclined at an angle 60
an object is placed asymmetrically between them. Then number of images formed will be :
( A cdot 6 )
B. 5
( c cdot 7 )
( D )
8
42From the diagram, what is the angle of
reflection?
A ( cdot 10^{circ} )
B ( cdot 20^{circ} )
( c cdot 30^{circ} )
D ( .40^{circ} )
7
43Which of the following letters will be seen without any change in a plane mirror?
A.
B. T
( c cdot L )
D.
7
44A man stands in front of a plane mirror at a distance of 2 metres. The distance
of his image from him will be –
( mathbf{A} cdot 2 ) metres
B. 1 metres
c. 3 metres
D. 4 metres
7
45Let two mirrors ( A ) and ( B ) be separated by a distance of ( 10 mathrm{m} ). Let object 0 be
placed at midpoint of the mirrors. Let ( boldsymbol{I}_{1} ) be the first image in mirror ( A ) and ( I_{2} ) be the second image in mirror B. What is
the distance between ( I_{1} ) and ( I_{2} ? )
A . ( 10 m )
B. ( 20 m )
( c .30 m )
D. ( 40 m )
8
46A tiny mirror M is fixed on a piece of
cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to
position of bulb is shown in Fig. as ( A, B )
( mathrm{C} ) and ( mathrm{D} . ) In which of the shown figure, the light will be visible to eye?
This question has multiple correct options
( A cdot A )
B. B
( c cdot c )
( D )
7
47With an object between those, if the angle between two plane mirrors is acute, the number of images formed will be:
( A . ) more than 3
B. less than 3
c. more than 1
D. equal to zero
8
48A plane mirror makes an angle of ( 30^{circ} )
with the horizontal. If a vertical ray strikes the mirror. Find the angle
between the mirror and the reflected
ray?
8
49Two plane mirrors are parallel to each other and spaced ( 20 mathrm{cm} ) apart. ( mathrm{A} ) luminous point is placed between them
at a distance ( 5 mathrm{cm} ) from one mirror.
Determine the distances of the first
nearest images from each other
8
50A hair dresser stands with her nose 20
( mathrm{cm} ) infront of a plane mirror for what distance must she focus her eyes in
order to see her nose in the mirror?
A . ( 40 mathrm{cm} )
B. ( 50 mathrm{cm} )
c. ( 30 mathrm{cm} )
D. ( 60 mathrm{cm} )
7
51State whether true or false.
The image formed by a plane mirror is always real
A. True
B. False
7
52Two mirrors at an angle ( theta^{circ} ) produces 5 images of a point. The number of images produced when ( theta ) is decreased
( operatorname{to} theta-30^{circ} ) is then going to be
( A cdot 9 )
B. 10
c. 11
D. 12
8
53Kaliedoscope is made by using:
A. convex mirror
B. concave mirror
c. plane mirror
D. spherical mirror
8
54A point source of light ( mathrm{S} ) is placed in
front of two large mirrors as shown
Which of the following observers will
see only one image of ( s ? )
8
55If an object is placed symmetrically between two plane mirrors, inclined at
an angle of ( 72^{0}, ) then the total number of
images formed is:
A. 5
B. 4
( c cdot 2 )
D. Infinite
8
56Two mirrors are inclined at an angle of
( 45^{0}, ) an object is placed between them. Then number of images formed will be:
( A cdot 6 )
B. 7
( c .5 )
D.
8
57Two plane mirror are inclined to one
another at an angle of ( 60 . ) A ray is
incident on mirror M1 at an angle i. The
reflected ray from mirror ( M_{1} ) is shown
in figure. The angle of incidence lis
A ( .20^{circ} )
B. ( 10^{circ} )
( c cdot 30^{circ} )
D. 40
8
58Three flat mirrors are arranged mutually perpendicular to each other. The number of distinct images that will be formed due to a point object is?
( A cdot 6 )
B. 7
c. 12
D. None of these
8
59Which instrument is used to see around
corners?
A. Kaleidoscope
B. Telescope
c. Periscope
D. compound microscope
8
60In above figure, a candle is placed in
front of the plane mirror. Points ( A, B, C, D ) and E are marked as shown in the
figure. Find out the possible point where image is formed.
( A cdot A )
B. В
( c cdot c )
( D cdot D )
E.
7
61Two plane mirrors are inclined at ( 70^{0} . ) A
ray incident on one mirror at an angle ( theta ) after reflection falls on the second
mirror and is reflected from there
parallel to the first mirror ( boldsymbol{theta} ) is
A ( .50^{circ} )
В . ( 45^{circ} )
( c cdot 30^{0} )
D. 55
8
62As the angle between the mirrors
decreases the number of images formed also decreases.
A. True
B. False
8
63A candle is placed in front of an optical instrument, and an image is obtained as erect, virtual, and reversed from left
to right. Identify the device that would produce the types of images described
above.
A. Concave mirror
B. Convex mirror
c. concave lens
D. Convex lens
E. Flat mirror
7
64If two mirrors are kept at ( 60^{0} ) to each other and a body is placed in the middle, then total number of images
formed is
A. Three
B. Four
c. Five
D. six
8
65State whether true or false.
The image formed in a plane mirror is formed as far behind the mirror as the
object is in front of it.
A. True
B. False
7
66Image formed by a plane mirror is:
This question has multiple correct options
A. of same size as that of object
B. at the same distance behind the mirror as the object in front
( mathbf{C} ). erect
D. real in nature
7
67Which of the following forms a virtual and erect image for all positions of the object?
A. Convex lens
B. Plane mirror
c. Convex mirror
D. Concave mirror
7
68Two plane mirrors are inclined at an
angle ( theta ) as shown. If at an angle ( 45^{circ} ) the
final ray horizontal, then find angle ( theta )
7
69Assertion
When an object is placed between two plane parallel mirrors, then all the images found are of equal intensity.
Reason

In case of plane parallel mirrors, only two images are possible.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct

8
70An object is placed
(i) Asymmetrically
( (i i) ) Symmetrically, between two plane
mirrors inclined at an angle of ( 50^{circ} . ) Find
the number of images formed.
A ( cdot(1) 7,(i i) 7 )
B. (1) 6, ( ii)6
c. ( (1) 6,(i i) 7 )
D. ( (1) 7,(i i) 6 )
8
71A person ( A B ) of height ( 170 c m ) is standing in front of a plane mirror. His eyes are at height ( 164 mathrm{cm} ). At what
distance from P should a hole be made
in the mirror so that he cannot see the
top of his head
8
72An optician, while testing the eyes of a patient, keeps a chart of letters ( 3 mathrm{m} )
behind the patient and asks her to see the letters on the image of chart formed
in a plane mirror kept at distance ( 2 mathrm{m} ) in front of her. How far away is the chart seen by the patient?
A. 3 m
B. 2 m
( c cdot 6 m )
D. ( 7 mathrm{m} )
7
73Which of the following best describes image formation by a plane mirror?
A. A real image is formed in front of the mirror
B. A real image is formed behind the mirror
c. A virtual image is formed in front of the mirror
D. A virtual image is formed behind the mirror
7
74When the angle between two plane
mirrors is ( 60^{circ}, ) how many multiple images will be formed by the mirrors?
( A cdot 6 )
B. 7
( c cdot 4 )
D. 5
7
75An observer moves towards a stationary
plane mirror at a speed of ( 4 mathrm{ms}^{-1} ). What
is the relative speed of the image with respect to the observer?
A ( cdot 2 mathrm{ms}^{-1} )
B. ( 4 mathrm{ms}^{-1} )
( c cdot 8 m s^{-1} )
D. the image will stay at rest
8
76When the angle between two
plane mirrors is ( 30^{circ}, ) how many multiple images will be formed by the mirrors?
A . 1
B. 12
( c cdot 5 )
( D cdot 13 )
8
77A plane mirror is made up of
A. Few metre thick glass plate
B. Few mm thick glass plate
C. Few cm thick glass plate
D. None
8
78A small object is ( 10 mathrm{cm} ) in front of a plane mirror. A man stands 30 cm from the mirror behind the object and looks at the object’s image. He should focus his eyes to see the image at a distance of from himself. (Fill in the blank)
( A cdot 25 mathrm{cm} )
B. 35 cm
c. ( 45 mathrm{cm} )
D. ( 40 mathrm{cm} )
7
79When the angle between two plane
mirrors is ( 60^{circ} ), how many images will be formed by the mirrors?
A. 5
B. 6
( c cdot 7 )
D. 8
8
80The perpendicular drawn at any point on a mirror is called:
A. incident ray
B. reflected ray
c. normal
D. image
7
81An object is kept at ( 60 mathrm{cm} ) in front of a plane mirror. If the mirror is now moved
( 25 mathrm{cm} ) away from the object, how is the image shifted from its previous position?
A . ( 25 mathrm{cm} ) away
B. ( 25 mathrm{cm} ) towards
c. ( 50 mathrm{cm} ) away
D. ( 50 mathrm{cm} ) towards
7
82In a plane mirror, the image is as far behind the mirror as the object is in front of it.
A. True
B. False
7
83Figure shows two rays ( A ) and ( B ) being
reflected by a mirror and going as ‘A’
and ‘B’. The mirror
A. is plane
B. is convex
( c . ) is concave
D. may be any spherical mirror
7
84Which type of an image is formed by a plane mirror?
A . Real & inverted
B. Real & erect
c. virtual & erect
D. Virtual & inverted
7
85A ray is reflected in turn by three plane mirrors mutually at right angles to each other. The angle between the incident and the reflected rays is.
( mathbf{A} cdot 180^{circ} )
B . 0
( c cdot 90 )
D. 45
8
86When the distance between the object and the plane mirror increases:
A. The image remains same
B. The size of the image will become less than the size of the object
c. The distance between the image and the plane mirror increases
D. The distance between the image and the plane mirror decreases
7
87When the distance between the object
and the plane mirror increases.
A. The image remains same
B. The size of the image will become less than the size of the object
c. The distance between the image and the plane mirror increases
D. The distance between the image and the plane mirror decreases
7
88Which of these are characteristics of an
image formed by a plane mirror? This question has multiple correct options
A. The image is virtual
B. The image is erect
C. The image formed is of the same size as that of the object
D. The image is laterally inverted
7
89An object of ( 10 mathrm{cm} ) is placed in front of a plane mirror. The height of image will be
A. ( 5 mathrm{cm} )
B. ( 15 mathrm{cm} )
c. ( 20 mathrm{cm} )
D. ( 10 mathrm{cm} )
7
90A point object is placed mid-way between two plane mirrors at distance
‘a’ apart. The plane mirror forms an infinite number of images due to multiple reflections. The distance
between the first two images formed behind any mirror is:
( A )
B. ( 2 a )
c. ( a / 2 )
D. ( 4 a )
8
91A plane mirror produces a magnification of:
A. zero
B. – –
( c cdot+1 )
D. Between 0 and +1
7
92A plane mirror makes an angle of ( 30^{circ} ) with horizontal. If a vertical ray strikes
the mirror, find the angle between mirror and reflected ray
A . ( 30^{circ} )
B . ( 45^{circ} )
( c cdot 60^{circ} )
D. ( 90^{circ} )
8
93Two plane mirrors, each of length ( 10 c m ) are placed perpendicular to each other. How many images of an object, placed between the mirrors, are formed?
( A cdot 3 )
B. 2
c. Infinite
( D )
8
94State whether the following statement is True or False?

The size of the image produced by plane
mirror is the same as that of the
objects.
A. True
B. False

7
95Designs of wallpapers and fabrics are obtained with the help of:
A. periscopes
B. kaleidoscopes
c. telescopes
D. microscopes
8
96( boldsymbol{A}=? )
( boldsymbol{B}=mathbf{?} )
A ( . A=2 m, B=7 m )
В ( . A=7 m, B=5 m )
( mathbf{c} . A=3 m, B=6 m )
D. ( A=2 m, B=5 m )
7
97An object is placed ( 15 mathrm{cm} ) from a diverging mirror, of radius of curvature 20 em. What is the image
magnification produced?
( A cdot+0.4 )
B. -0.4
( c cdot+2 )
( D ldots-2 )
7
98In order to be used as mirrors, glasses are coated with:
A . Silver
B. Copper
c. Aluminium
D. Platinum
7
99At what angle the rectangular mirrors are set to each other in Kaleidoscope?
A. 90 degree
B. 30 degree
c. 60 degree
D. 120 degree
8
100Image is formed at that point where
A . At least two rays of light meet
B. Where three rays of light meet
c. Where two rays of light appear to meet
D. B and C
7
101Two plane mirrors are inclined at angle
( boldsymbol{theta} boldsymbol{theta} ) is equal to
A ( cdot 90^{circ} )
B. 60
( c .45 )
D. ( 30^{circ} )
8
102How many images are formed for a point object kept in between two plane
mirrors ( M_{1} ) and ( M_{2}, ) at right angles to
each other?
A . 1
B. 2
( c .3 )
( D cdot 4 )
8
103Is the image formed by the plane mirror exactly of the same size as the object?7
104toppr
Q Type your question.
mirrors, then 5 images of the object will be formed.

Reason: For a given system of mirrors the total number of images formed due to successive reflection is equal to either ( frac{360^{circ}}{theta} ) or ( frac{360^{circ}}{theta}-1 ) accordingly as ( frac{360^{circ}}{theta} ) is odd or even respectively.
A. If both Assertion ‘and Reason are correct and Reason
is the correct explanation
B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
c. If Assertion is correct but Reason is incorrect
D. If Assertion is incorrect but Reaso

8
105A tube containing two or more plane mirrors, inclined at certain angles to each other, is called a Fill
in the blanks.
A . Microscope
B. Telescope
c. Kaleidoscope
D. Periscope
8
106Two mirrors ( A ) and ( B ) are placed at right
angles to each other as shown in figure. A ray of light incident on mirror ( A ) at an
angle of ( 25^{circ} ) falls on mirror ( mathrm{B} ) after
reflection. The angle of reflection for the ray reflected from mirror B would be:
( mathbf{A} cdot 25^{circ} )
B. ( 50^{circ} )
( mathbf{c} cdot 65^{circ} )
D. ( 115^{circ} )
8
107A ray reflected successively from two plane mirrors inclined at a certain
angle ( 90^{circ} ) undergoes a deviation of ( 300^{circ} ) The number of images observable are:
A . 10
B. 11
c. 12
D. 14
8
108(a) Find the angle of incidence.
(b) Find the angle between the incident
and reflected rays.

Figure shows an incident ray ( A O ) and
the normal ( O N ) on a plane mirror. The
angle which the incident ray ( A O ) makes
with a mirror is ( 30^{circ} )
( mathbf{A} cdot(a) 60^{circ},(b) 60^{circ} )
B . ( (a) 120^{circ},(b) 120^{circ} )
( mathbf{c} cdot(a) 60^{circ},(b) 120^{circ} )
D. ( (a) 120^{circ},(b) 60^{circ} )

7
109A bulb is placed between two plane
mirrors inclined at an angle of ( 60^{0} ). The number of images formed is :
( mathbf{A} cdot mathbf{5} )
B. 6
( c cdot 4 )
D. 3
8
110A plane mirror:
(i) can form real image of a real object
(ii) neither converges not diverges the
rays
(iii) cannot form real image of a real object

Choose the correct option or options.
A. (i) is correct
B. (i) and (ii) are correct
c. (ii) and (iii) are correct
D. None of the above

7
111Which of the following letter shaped
pipe is most effective to build a Periscope?
( A cdot A )
B.
( c cdot z )
D.
8
112Two plane mirror are inclined as shown in figure an object is placed at origin. Ist reflection takes place from ( M_{1} ) and
then from ( M_{2} ). Calculate the
coordinates of final image.
8
113The image of a real object in a plane
mirror is always:
A. Virtual
B. Erect
c. Laterally inverted with respect to the object
D. All of these
7
114A plane mirror gives a real image when the incident beam is:
A. Wide
B. Narrow
c. convergent
D. Divergent
7

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