Ray Optics: JEE Mains Previous Year Questions (2021-2024) | Physics for JEE Main & Advanced PDF Download

 Page 1


Previous Year Questions (2021-24): 
Ray Optics 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
The distance between object and its 3 times magnified virtual image as produced 
by a convex lens is 20 cm . The focal length of the lens used is cm . 
Q2 - 2024 (27 Jan Shift 1) 
If the refractive index of the material of a prism is cot?(
?? 2
), where ?? is the angle of 
prism then the angle of minimum deviation will be 
(1) ?? - 2 A 
(2) 
?? 2
- 2 A 
(3) ?? - A 
(4) 
?? 2
- A 
Q3 - 2024 (27 Jan Shift 1) 
A convex lens of focal length 40 cm forms an image of an extended source of 
light on a photoelectric cell. A current ?? is produced. The lens is replaced by 
another convex lens having the same diameter but focal length 20 cm . The 
photoelectric current now is : 
(1) 
1
2
 
(2) 4 I 
(3) 2 I 
(4) I 
Q4 - 2024 (27 Jan Shift 1) 
Two immiscible liquids of refractive indices 
8
5
 and 
3
2
 respectively are put in a 
beaker as shown in the figure. The height of each column is 6 cm . A coin is 
Page 2


Previous Year Questions (2021-24): 
Ray Optics 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
The distance between object and its 3 times magnified virtual image as produced 
by a convex lens is 20 cm . The focal length of the lens used is cm . 
Q2 - 2024 (27 Jan Shift 1) 
If the refractive index of the material of a prism is cot?(
?? 2
), where ?? is the angle of 
prism then the angle of minimum deviation will be 
(1) ?? - 2 A 
(2) 
?? 2
- 2 A 
(3) ?? - A 
(4) 
?? 2
- A 
Q3 - 2024 (27 Jan Shift 1) 
A convex lens of focal length 40 cm forms an image of an extended source of 
light on a photoelectric cell. A current ?? is produced. The lens is replaced by 
another convex lens having the same diameter but focal length 20 cm . The 
photoelectric current now is : 
(1) 
1
2
 
(2) 4 I 
(3) 2 I 
(4) I 
Q4 - 2024 (27 Jan Shift 1) 
Two immiscible liquids of refractive indices 
8
5
 and 
3
2
 respectively are put in a 
beaker as shown in the figure. The height of each column is 6 cm . A coin is 
placed at the bottom of the beaker. For near normal vision, the apparent depth of 
the coin is 
?? 4
 cm . The value of ?? is 
 
Q5 - 2024 (29 Jan Shift 1) 
A convex mirror of radius of curvature 30 cm forms an image that is half the size 
of the object. The object distance is : 
(1) -15 cm 
(2) 45 cm 
(3) -45 cm 
(4) 15 cm 
Q6 - 2024 (29 Jan Shift 1) 
A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal 
length when immersed in a liquid of refractive index 1.6 will be: 
(1) -16 cm 
(2) -160 cm 
(3) +160 cm 
(4) +16 cm 
Q7 - 2024 (29 Jan Shift 2) 
If the distance between object and its two times magnified virtual image produced 
by a curved mirror is 15 cm , the focal length of the mirror must be : 
(1) 15 cm 
(2) -12 cm 
(3) -10 cm 
Page 3


Previous Year Questions (2021-24): 
Ray Optics 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
The distance between object and its 3 times magnified virtual image as produced 
by a convex lens is 20 cm . The focal length of the lens used is cm . 
Q2 - 2024 (27 Jan Shift 1) 
If the refractive index of the material of a prism is cot?(
?? 2
), where ?? is the angle of 
prism then the angle of minimum deviation will be 
(1) ?? - 2 A 
(2) 
?? 2
- 2 A 
(3) ?? - A 
(4) 
?? 2
- A 
Q3 - 2024 (27 Jan Shift 1) 
A convex lens of focal length 40 cm forms an image of an extended source of 
light on a photoelectric cell. A current ?? is produced. The lens is replaced by 
another convex lens having the same diameter but focal length 20 cm . The 
photoelectric current now is : 
(1) 
1
2
 
(2) 4 I 
(3) 2 I 
(4) I 
Q4 - 2024 (27 Jan Shift 1) 
Two immiscible liquids of refractive indices 
8
5
 and 
3
2
 respectively are put in a 
beaker as shown in the figure. The height of each column is 6 cm . A coin is 
placed at the bottom of the beaker. For near normal vision, the apparent depth of 
the coin is 
?? 4
 cm . The value of ?? is 
 
Q5 - 2024 (29 Jan Shift 1) 
A convex mirror of radius of curvature 30 cm forms an image that is half the size 
of the object. The object distance is : 
(1) -15 cm 
(2) 45 cm 
(3) -45 cm 
(4) 15 cm 
Q6 - 2024 (29 Jan Shift 1) 
A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal 
length when immersed in a liquid of refractive index 1.6 will be: 
(1) -16 cm 
(2) -160 cm 
(3) +160 cm 
(4) +16 cm 
Q7 - 2024 (29 Jan Shift 2) 
If the distance between object and its two times magnified virtual image produced 
by a curved mirror is 15 cm , the focal length of the mirror must be : 
(1) 15 cm 
(2) -12 cm 
(3) -10 cm 
(4) 10/3 cm 
Q8 - 2024 (30 Jan Shift 1) 
The distance between object and its two times magnified real image as produced 
by a convex lens is 45 cm . 
The focal length of the lens used is __ cm . 
Q9 - 2024 (30 Jan Shift 2) 
In an experiment to measure the focal length (f) of a convex lens, the magnitude 
of object distance (x) and the image distance (y) are measured with reference to 
the focal point of the lens. The ?? - ?? plot is shown in figure. 
The focal length of the lens is __ cm . 
 
Q10 - 2024 (31 Jan Shift 1) 
The refractive index of a prism with apex angle A is cot?A/2. The angle of 
minimum deviation is : 
(1) ?? m
= 180
°
- A 
(2) ?? m
= 180
°
- 3 A 
(3) ?? m
= 180
°
- 4 A 
(4) ?? ?? = 180
°
- 2 A 
Page 4


Previous Year Questions (2021-24): 
Ray Optics 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
The distance between object and its 3 times magnified virtual image as produced 
by a convex lens is 20 cm . The focal length of the lens used is cm . 
Q2 - 2024 (27 Jan Shift 1) 
If the refractive index of the material of a prism is cot?(
?? 2
), where ?? is the angle of 
prism then the angle of minimum deviation will be 
(1) ?? - 2 A 
(2) 
?? 2
- 2 A 
(3) ?? - A 
(4) 
?? 2
- A 
Q3 - 2024 (27 Jan Shift 1) 
A convex lens of focal length 40 cm forms an image of an extended source of 
light on a photoelectric cell. A current ?? is produced. The lens is replaced by 
another convex lens having the same diameter but focal length 20 cm . The 
photoelectric current now is : 
(1) 
1
2
 
(2) 4 I 
(3) 2 I 
(4) I 
Q4 - 2024 (27 Jan Shift 1) 
Two immiscible liquids of refractive indices 
8
5
 and 
3
2
 respectively are put in a 
beaker as shown in the figure. The height of each column is 6 cm . A coin is 
placed at the bottom of the beaker. For near normal vision, the apparent depth of 
the coin is 
?? 4
 cm . The value of ?? is 
 
Q5 - 2024 (29 Jan Shift 1) 
A convex mirror of radius of curvature 30 cm forms an image that is half the size 
of the object. The object distance is : 
(1) -15 cm 
(2) 45 cm 
(3) -45 cm 
(4) 15 cm 
Q6 - 2024 (29 Jan Shift 1) 
A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal 
length when immersed in a liquid of refractive index 1.6 will be: 
(1) -16 cm 
(2) -160 cm 
(3) +160 cm 
(4) +16 cm 
Q7 - 2024 (29 Jan Shift 2) 
If the distance between object and its two times magnified virtual image produced 
by a curved mirror is 15 cm , the focal length of the mirror must be : 
(1) 15 cm 
(2) -12 cm 
(3) -10 cm 
(4) 10/3 cm 
Q8 - 2024 (30 Jan Shift 1) 
The distance between object and its two times magnified real image as produced 
by a convex lens is 45 cm . 
The focal length of the lens used is __ cm . 
Q9 - 2024 (30 Jan Shift 2) 
In an experiment to measure the focal length (f) of a convex lens, the magnitude 
of object distance (x) and the image distance (y) are measured with reference to 
the focal point of the lens. The ?? - ?? plot is shown in figure. 
The focal length of the lens is __ cm . 
 
Q10 - 2024 (31 Jan Shift 1) 
The refractive index of a prism with apex angle A is cot?A/2. The angle of 
minimum deviation is : 
(1) ?? m
= 180
°
- A 
(2) ?? m
= 180
°
- 3 A 
(3) ?? m
= 180
°
- 4 A 
(4) ?? ?? = 180
°
- 2 A 
Q11 - 2024 (31 Jan Shift 2) 
Light from a point source in air falls on a convex curved surface of radius 20 cm 
and refractive index 1.5 . If the source is located at 100 cm from the convex 
surface, the image will be formed at cm from the object. 
Answer Key 
Q1 (15)  ?? 2(1) Q3 (4)  Q4 (31) 
Q5 (1)  Q6 (2) Q7 (3)  ???? (10) 
Q9(20) Q10 (4) Q11 (200)  
 
Solutions 
Q1 
 
?? = 3?? 
?? - ?? = 20 cm 
2?? = 20 cm 
?? = 10 cm 
1
(-30)
-
1
(-10)
=
1
?? 
?? = 15 cm 
 
Page 5


Previous Year Questions (2021-24): 
Ray Optics 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
The distance between object and its 3 times magnified virtual image as produced 
by a convex lens is 20 cm . The focal length of the lens used is cm . 
Q2 - 2024 (27 Jan Shift 1) 
If the refractive index of the material of a prism is cot?(
?? 2
), where ?? is the angle of 
prism then the angle of minimum deviation will be 
(1) ?? - 2 A 
(2) 
?? 2
- 2 A 
(3) ?? - A 
(4) 
?? 2
- A 
Q3 - 2024 (27 Jan Shift 1) 
A convex lens of focal length 40 cm forms an image of an extended source of 
light on a photoelectric cell. A current ?? is produced. The lens is replaced by 
another convex lens having the same diameter but focal length 20 cm . The 
photoelectric current now is : 
(1) 
1
2
 
(2) 4 I 
(3) 2 I 
(4) I 
Q4 - 2024 (27 Jan Shift 1) 
Two immiscible liquids of refractive indices 
8
5
 and 
3
2
 respectively are put in a 
beaker as shown in the figure. The height of each column is 6 cm . A coin is 
placed at the bottom of the beaker. For near normal vision, the apparent depth of 
the coin is 
?? 4
 cm . The value of ?? is 
 
Q5 - 2024 (29 Jan Shift 1) 
A convex mirror of radius of curvature 30 cm forms an image that is half the size 
of the object. The object distance is : 
(1) -15 cm 
(2) 45 cm 
(3) -45 cm 
(4) 15 cm 
Q6 - 2024 (29 Jan Shift 1) 
A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal 
length when immersed in a liquid of refractive index 1.6 will be: 
(1) -16 cm 
(2) -160 cm 
(3) +160 cm 
(4) +16 cm 
Q7 - 2024 (29 Jan Shift 2) 
If the distance between object and its two times magnified virtual image produced 
by a curved mirror is 15 cm , the focal length of the mirror must be : 
(1) 15 cm 
(2) -12 cm 
(3) -10 cm 
(4) 10/3 cm 
Q8 - 2024 (30 Jan Shift 1) 
The distance between object and its two times magnified real image as produced 
by a convex lens is 45 cm . 
The focal length of the lens used is __ cm . 
Q9 - 2024 (30 Jan Shift 2) 
In an experiment to measure the focal length (f) of a convex lens, the magnitude 
of object distance (x) and the image distance (y) are measured with reference to 
the focal point of the lens. The ?? - ?? plot is shown in figure. 
The focal length of the lens is __ cm . 
 
Q10 - 2024 (31 Jan Shift 1) 
The refractive index of a prism with apex angle A is cot?A/2. The angle of 
minimum deviation is : 
(1) ?? m
= 180
°
- A 
(2) ?? m
= 180
°
- 3 A 
(3) ?? m
= 180
°
- 4 A 
(4) ?? ?? = 180
°
- 2 A 
Q11 - 2024 (31 Jan Shift 2) 
Light from a point source in air falls on a convex curved surface of radius 20 cm 
and refractive index 1.5 . If the source is located at 100 cm from the convex 
surface, the image will be formed at cm from the object. 
Answer Key 
Q1 (15)  ?? 2(1) Q3 (4)  Q4 (31) 
Q5 (1)  Q6 (2) Q7 (3)  ???? (10) 
Q9(20) Q10 (4) Q11 (200)  
 
Solutions 
Q1 
 
?? = 3?? 
?? - ?? = 20 cm 
2?? = 20 cm 
?? = 10 cm 
1
(-30)
-
1
(-10)
=
1
?? 
?? = 15 cm 
 
Q2 
cot?
?? 2
=
sin?(
?? + ?? min
2
)
sin?
?? 2
 
? cos?
?? 2
= sin?(
?? + ?? min
2
) 
?? + ?? min
2
=
?? 2
-
?? 2
 
?? min 
= ?? - 2 A 
Q3 
As amount of energy incident on cell is same so current will remain same. 
Q4 
h
upp
=
h
1
?? 1
+
h
2
?? 2
=
6
3/2
+
6
8/5
= 4 +
15
4
=
31
4
 cm 
Q5 
 
Given R = 30 cm 
f = R/2 = +15 cm 
Magnification (m)= ±
1
2
 
For convex mirror, virtual image is formed for real object. 
Therefore, m is +ve 
1
2
=
?? ?? - ??