WBJEE SERIES Physics
Ray Optics And Optical Instruments
16 previous year questions.
Volume: 16 Ques
Yield: Medium
High-Yield Trend
2
2024 2
2023 1
2018 1
2017 1
2015 2
2014 1
2013 2
2012 3
2011 1
2010 Chapter Questions 16 MCQs
01
PYQ 2010
medium
physics ID: wbjee-20
If be the size of the magnified image and the size of the diminished image in Lens Displacement Method, then the size of the object is
1
2
3
4
02
PYQ 2011
medium
physics ID: wbjee-20
If the focal length of the eye-piece of a telescope is doubled, its magnifying power will be
1
2
3
4
03
PYQ 2011
medium
physics ID: wbjee-20
A plano-concave lens is made of glass of refractive index and the radius of curvature of its curved face is . What is the power of the lens?
1
+0.5 D
2
-0.5 D
3
-2D
4
+2D
04
PYQ 2011
medium
physics ID: wbjee-20
A diver at a depth of in water sees the sky in a cone of semi vertical angle
1
2
3
4
05
PYQ 2012
medium
physics ID: wbjee-20
An object placed in front of a concave mirror at a distance of from the pole gives a times magnified real image. If it is moved to a distance of , the magnification of the image becomes . The focal length of the mirror is
1
15 cm
2
20 cm
3
25 cm
4
30 cm
06
PYQ 2012
medium
physics ID: wbjee-20
If the velocity of light in vacuum is the time taken (in nanosecond) to travel through a glass plate of thickness and refractive index is
1
0.5
2
1
3
2
4
3
07
PYQ 2013
medium
physics ID: wbjee-20
A biconvex lens of focal length and radii of curvature of both the surfaces is made of a material of refractive index . This lens is placed in a liquid of refractive index . Now this lens will behave like
1
either as a convex or as a concave len depending solely on R
2
a convex lens depending on and
3
a concave lens depending on and
4
a convex lens of same focal length irrespective of R, and
08
PYQ 2014
medium
physics ID: wbjee-20
A glass slab consists of thin uniform layers of progressively decreasing refractive indices (see figure) such that the of any layer is . Here and denote the of layer and the difference in between any two consecutive layers, respectively. The integer denotes the numbers of the successive layers. A ray of light from the 0th layer enters the layer at an angle of incidence of . After undergoing the refraction, the ray emerges parallel to the interface. If and , the value of is
1
20
2
30
3
40
4
50
09
PYQ 2014
medium
physics ID: wbjee-20
The intermediate image formed by the objective of a compound microscope is
1
real, inverted and magnified
2
real, erect and magnified
3
virtual, erect and magnified
4
virtual, inverted and magnified
10
PYQ 2015
medium
physics ID: wbjee-20
A ray of light is incident at an angle on a glass slab of refractive index . The angle between reflected and refracted light is . Then, the relationship between and is
1
2
3
4
11
PYQ 2017
hard
physics ID: wbjee-20
A parallel beam of light is incident on a glass prism in the shape of a quarter cylinder of radius and refractive index n = placed on a horizontal table as shown in the figure. Beyond the cylinder, a patch of light is found whose nearest distance from the cylinder is
1
2
3
4
12
PYQ 2018
easy
physics ID: wbjee-20
There is a small air bubble at the center of a solid glass sphere of radius and refractive index . What will be the apparent distance of the bubble from the centre of the sphere, when viewed from outside?
1
2
3
4
0
13
PYQ 2023
hard
physics ID: wbjee-20
Three identical convex lenses each of focal length f are placed in a straight line separated by a distance f from each other. An object is located in in front of the leftmost lens. Then,
1
The final image will be at f/2 behind the rightmost lens and it's magnification will be -1
2
The final image will be at f/2 behind the rightmost lens and it's magnification will be -1
3
The final image will be at f behind the rightmost lens and it's magnification will be -1
4
The final image will be at f behind the rightmost lens and it's magnification will be +1
14
PYQ 2023
medium
physics ID: wbjee-20
A ray of monochromatic light is incident on the plane surface of separation between two media X and Y with the angle of incidence 'i' in medium X and angle of refraction 'r' in medium Y. The given graph shows the relation between sin i and sin r. If Vx and Vy are the velocities of the ray in media X and Y respectively, Then which of the following is true?
1
Vx= Vy
2
Vx= Vy
3
Total internal reflection can happen when the light is incident in medium X.
4
Vx= Vy, where Vx and Vy are frequencies of the light and medium X and Y respectively.
15
PYQ 2024
medium
physics ID: wbjee-20
Two convex lenses ( and ) of equal focal length are placed at a distance apart. An object is placed at a distance to the left of as shown in the figure. The final image is at:
1
right of
2
left of
3
right of
4
left of
16
PYQ 2024
medium
physics ID: wbjee-20
If , , and represent unit vectors along the incident ray, reflected ray, and normal to the surface, respectively, then:
1
2
3
4