Topic Reflection ( Ray Optics ), Class 12 Physics MCQ Quiz Test

MCQ 1:
When light is reflected from a mirror a change occurs in its -

phase
frequency
wavelength
speed

MCQ 2:
On reflection from a plane surface, the following gets changed –

wavelength
frequency
speed
amplitude

MCQ 3:
A wave or a pulse is reflected normally from the surface of a denser medium back into the rarer medium. The phase change caused by the reflection -

0
π/2
π
3π/2

MCQ 4:
The frequency of incident ray is 3 × 10⁸ Hz. The frequency after reflection -

decreases
remain same
increases
either 1 or 3

MCQ 5:
The images of clouds and trees in water always less bright than in reality –

because water is forming the image dirty
because there is an optical illusion due to which the image appears to be less bright
because only a portion of the incident light is reflected and quite a large portion goes mid water
because air above the surface of water contains a lot of moisture

MCQ 6:
If a ray of light is incident on a plane mirror at an angle of incidence of 30°, then deviation produced by mirror is -

30°
60°
90°
120°

MCQ 7:
A rays is incident at an angle 38° on a mirror. The angle between normal and reflected ray is -

38°
52°
90°
76°

MCQ 8:
The image of a real object formed by a plane mirror is -

Erect, real and of equal size
Erect, virtual and of equal size
Inverted, real and of equal size
Inverted, virtual and of equal size

MCQ 9:
If you want to see your full image, then minimum size of the mirror -

should be of your height
should be half of your height
should be twice of your height
depends upon distance from the mirror

MCQ 10:
Mark the correct options -

If the incident rays are converging, we have a real object.
If the final rays are converging, we have a real image.
The image of a virtual object is called a virtual image.
If the image is virtual, the corresponding object is called a virtual object.

MCQ 11:
A point source of light is placed in front of a plane mirror -

All the reflected rays meet at a point when produced backward
Only the reflected rays close to the backward
Only the reflected rays making a small angle with the mirror, meet at a point when produced backward
Light of different colours make different images

MCQ 12:
Which of the following is not the case with image formed by a plane mirror -

It is erect
It is virtual
It is diminished
It is at the same distance as the object

MCQ 13:
A man 160 cm height stands in front of a plane mirror. His eyes are at a height of 150 cm from the floor. Then the minimum length of the plane mirror for him to see his full length image is -

85 cm
170 cm
80 cm
340 cm

MCQ 14:
Which of the following letters do not suffer lateral inversion -

HGA
HOX
VET
YUL

MCQ 15:
A small object is 10 cm in front of a plane mirror. A man stands 30 cm from the mirror, behind the object and looks at the objects image. He should focus his eyes to see the image at a distance -

25 cm
35 cm
45 cm
40 cm

MCQ 16:
A plane mirror produces a magnification of -

-1
+1
Zero
Between 0 and + infinity

MCQ 17:
An object is initially at a distance of 100 cm from a plane mirror. If the mirror approaches the object at a speed of 5 cm/s. Then after 6 s the distance between the object and its image will be -

60 cm
140 cm
170 cm
150 cm

MCQ 18:
A plane mirror is approaching you at 10 cm per second. You can see your image in it. At what speed will your image approach you -

10 cm/s
5 cm/s
20 cm/s
15 cm/s

MCQ 19:
If an object approaches towards a plane mirror with velocity V? then image approaches the object with velocity -

V
1.5 V
2 V
3 V

MCQ 20:
A car is moving towards a plane mirror at a speed of 30 m/s. Then the relative speed of its image with respect to the car will be -

30 m/s
60 m/s
15 m/s
45 m/s

MCQ 21:
An object is approaching a plane mirror at 5 cms per second. A stationary observer sees the image. At what speed will the image approach the stationary observer -

5 cms per second
20 cms per second
10 cms per second
15 cms per second

MCQ 22:
A person is standing in front of a plane mirror. If the mirror recedes with velocity v, the relative separation of person and his image per second is -

0
V
2V
V/2

MCQ 23:
Two mirrors are placed perpendicular to each other. A ray strikes the first mirror and after reflection from the first mirror it falls on the second mirror. The ray after reflection from second mirror will emerge -

Perpendicular to the original ray
Parallel to the original ray
At 45° to the original ray
At 60° to the original ray

MCQ 24:
An object is placed between two plane mirrors set at 60° to each other. The maximum number of images seen will be -

2
3
5
6

MCQ 25:
A person is in a room whose ceiling and two adjacent walls are mirrors. How many images are formed ?

5
6
7
8

MCQ 26:
The number of images observable between two parallel plane mirrors is -

2
4
11
infinite

MCQ 27:
An object is placed symmetrically between the two plane mirrors inclined at an angle of 30°, then the total number of images formed, is -

12
2
11
infinite

MCQ 28:
If an object is placed unsymmetrically between two plane mirrors, inclined at the angle of 60°, then the total number of images formed is -

5
4
2
infinite

MCQ 29:
If an object is placed unsymmetrically between two plane mirrors, inclined at an angle of 72°, then the total number of images formed is -

5
4
2
Infinity

MCQ 30:
Two plane mirrors 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 M₂ is parallel to mirror M₁ as shown in figure. The angle of incidence i is -

20°
10°
30°
40°

MCQ 31:
Images formed by an object placed between two plane mirrors whose reflecting surfaces make an angle of 90deg; with one another lie on -

Straight line
Zig-zag curve
Circle
Ellipse

MCQ 32:
Two plane mirrors are inclined to one another at an angle of 40°. A point object is placed symmetrically in between them. The number of images formed due to reflection at both mirrors is -

Infinite
9
8
6

MCQ 33:
At what angle must two plane mirrors be placed so that incident and resulting reflected rays are always parallel to each other -

0
30
60
90

MCQ 34:
How many images of himself, does an observer see if two adjacent walls of rectangular room are mirror surfaced -

3
5
7
9

MCQ 35:
A ray gets successively reflected from two mirrors inclined at an angle of 40°. If the angle of incidence on the first mirror is 60°, then the net deviation of this ray is -

40
280
80
100

MCQ 36:
The focal length of spherical mirror is -

Maximum for red light
Maximum for blue light
Maximum for white light
Same for all lights

MCQ 37:
If a spherical mirror is immersed in a liquid, its focal length will -

Increase
Decrease
Remains unchanged
Depends on the nature of liquid

MCQ 38:
In a concave mirror experiment, an object is placed at a distance x₁ from the focus and the image is formed at a distance x₂ from the focus. The focal length of the mirror would be -

x₁x₂
√x₁x₂
√x₁/x₂
(x₁+x₂)/2

MCQ 39:
An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. The image produced is -

virtual and inverted
real and erect
real inverted and diminished
real, inverted and of same size as the object

MCQ 40:
An object of length 5cm is placed at a distance 1m from a concave mirror. If radius of curvature of mirror is 20 cm. Size of image will be -

0.11 cm
0.50 cm
0.55 cm
0.60 cm

MCQ 41:
When an object is placed at a distance of x m from a concave mirror, the magnification of the real image produced is 2. Then the radius of curvature of the mirror is -

4x
4x²
4x/3
3x/4

MCQ 42:
A short linear object is placed along optic axis of a concave mirror. If distance of nearer end of the object from the mirror is greater than radius of curvature then -

a real and elongated image will be formed
a virtual and elongated image will be formed
a real and diminished image will be formed
a virtual and diminished image will be formed

MCQ 43:
Sun subtends an angle of 0.5° at the pole of a concave mirror or radius of curvature 15 m. The diameter of the image of the sun formed by the mirror is -

8.55 cm
7.55 cm
6.55 cm
5.55 cm

MCQ 44:
The focal length of a concave mirror is 12 cm. Where should an object of length 4 cm be placed so that an image 1 cm long is formed ?

48 cm
3 cm
60 cm
15 cm

MCQ 45:
The focal length of a concave mirror is 20 cm. Determine where an object must be placed to form an image magnified two times when the image is real -

30 cm from the mirror
10 cm from the mirror
20 cm from the mirror
15 cm from the mirror

MCQ 46:
In the above question, if the magnified image is virtual, the distance of the object from the mirror must be -

30 cm
10 cm
20 cm
15 cm

MCQ 47:
A virtual image, larger than the object can be produced by -

convex mirror
concave mirror
plane mirror
concave lens

MCQ 48:
Given a point source of light, which of the following can produce a parallel beam of light

convex mirror
concave mirror
concave lens
two plane mirrors inclined at 90º to each other

MCQ 49:
The image formed by a concave mirror -

is always real
is always virtual
is certainly real if the object is virtual
is certainly virtual if the object is real.

MCQ 50:
A short linear object is placed along optic axis of a concave mirror. If the object is in between pole and focus, then -

a virtual image will be formed
a real diminished image will be formed
If object is in between pole and focus then a real and elongated image will be formed.
none of these

MCQ 51:
The image formed by convex mirror of focal length 30 cm is a quarter of the size of the object. Then the distance of the object from the mirror, is -

30 cm
90 cm
120 cm
60 cm

MCQ 52:
A convex mirror is used to form an image of a real object. Then tick the wrong statement -

the image lies between the pole and the focus
the image is diminished in size
the image is erect
the image is real

MCQ 53:
The largest distance of the image from a convex mirror of focal length 10 cm can be -

20 cm
infinite
10 cm
depends on the position of the object

MCQ 54:
An object is placed at a distance of 25 cm from the pole of a convex mirror and a plane mirror is set so that the virtual images formed by two mirrors do not have any parallax. The plane mirror is 20 cm from the object. The focal length of the mirror is -

37.5 cm
–7.5 cm
–37.5 cm
+ 75 cm

MCQ 55:
The rear-view mirror of a car is -

Plane
Convex
Concave
None of the above

MCQ 56:
An inverted image of a real object can be seen in a convex mirror - An inverted image of a real object can be seen in a convex mirror -

Under no circumstances
When object is very far from the mirror
When the object is at a distance equal to the radius of the mirror
When the object is at a distance equal to the focal length of the mirror

MCQ 57:
A point source is placed 15 cm away from a convex mirror. A virtual image is formed at a distance of 6 cm. The radius of curvature of the mirror is -

4.3 cm
8.6 cm
10 cm
20 cm

MCQ 58:
A boy of height 1 m stands in front of a convex mirror. His distance from the mirror is equal to its focal length. The height of his image is -

0.25 m
0.33 m
0.5 m
0.67 m

MCQ 59:
A convex mirror has a focal length f. A real object is placed at a distance f in front of it from the pole, produces an image at -

infinity
f
f/2
2f