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Wave Optics — JEE Main & Advanced Physics PYQs

433 previous year questions from Wave Optics with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

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1

In the List-I, four optical effects are mentioned. The physical phenomena of light which are essential to describe these optical effects are given in List-II. Choose the option whi

JEE Advanced 2026 Solution View → 2

In a single slit diffraction experiment, a slit of width (0.016 0.002) mm is used to measure the wavelength of a monochromatic light source. In the diffraction pattern, the angular

JEE Advanced 2026 Solution View → 3

As shown in the figure, a ray AB of unpolarized light enters from water of refractive index n_w = 4/3 into a medium of refractive index n_p = 4/ 3 after passing through a glass pla

JEE Advanced 2026 Solution View → 4

Some distant star is to be observed by some telescope of diameter of objective lens a , at an angular resolution of 3.0 10⁻⁷ radian. If the wavelength of light from the star reachi

JEE Main 2026 Solution View → 5

In a Young double slit experiment, the wavelength of incident light is 6000 Å, the separation between slits S₁ and S₂ is 5 cm and the distance between slits plane and screen is 50

JEE Main 2026 Solution View → 6

In interference experiment the path difference between two interfering waves at a point A on the screen is /3 , where is the wavelength of these waves, and at another point B the p

JEE Main 2026 Solution View → 7

An unpolarized light of intensity I_o passes through polarizer and then through a certain optically active solution and finally it goes to analyser. If the angle between analyser a

JEE Main 2026 Solution View → 8

The maximum intensity in a Young's double slit experiment is I₀ . Distance between the slits ( d ) is 5 , where is the wavelength of light used. The intensity of the fringe, exactl

JEE Main 2026 Solution View → 9

In Young's double slit experiment, the fringe width of the interference pattern produced on the screen is 2.4 m. If the experiment is carried out in another medium having refractiv

JEE Main 2026 Solution View → 10

An unpolarized light of certain intensity passes through a combination of two polarizers whose transmission axes are at 30° and 90° , respectively, with respect to the horizontal a

JEE Main 2026 Solution View → 11

In a double slit experiment, when one of the slits is covered by a transparent mica sheet of refractive index 1.56 , the central fringe shifts to the position of 7^ th bright fring

JEE Main 2026 Solution View → 12

A slit of width a is illuminated by light of wavelength . The linear separation between 1^ st and 3^ rd minima in the diffraction pattern produced on a screen placed at a distance

JEE Main 2026 Solution View → 13

A telescope with objective diameter R is used to observe a distant star emitting light of wavelength 500 nm, at a resolution of 5 10⁻⁷ radian. The value of R is _____ cm.

JEE Main 2026 Solution View → 14

An unpolarized light is incident on the plane interface of air-dielectric medium shown in figure. If the incident angle is equal to Brewster angle, identify the expression represen

JEE Main 2026 Solution View → 15

In a Young's double slit experiment, the intensity at some point on the screen is found to be 3 4 times of the maximum of the interference pattern. The path difference between the

JEE Main 2026 Solution View → 16

In single slit diffraction pattern, the wavelength of light used is 628 nm and slit width is 0.2 mm, the angular width of central maximum is 10⁻² degrees. The value of is _______.

JEE Main 2026 Solution View → 17

A beam of light consisting of wavelengths 650 nm and 550 nm illuminates the Young's double slits with separation of 2 mm such that the interference fringes are formed on a screen,

JEE Main 2026 Solution View → 18

Given below are two statements: Statement I : A plane wave after passing through prism remains as plane wave but passing through small pin hole may become spherical wave. Statement

JEE Main 2026 Solution View → 19

In the Young's double slit experiment the intensity produced by each one of the individual slits is I₀ . The distance between two slits is 2 mm. The distance of screen from slits i

JEE Main 2026 Solution View → 20

An unpolarised light is incident at an interface of two dielectric media having refractive indices of 2 (incident medium) and 2 3 (medium) respectively. To satisfy the condition th

JEE Main 2026 Solution View → 21

When an unpolarized light falls at a particular angle on a glass plate (placed in air), it is observed that the reflected beam is linearly polarized. The angle of refracted beam wi

JEE Main 2026 Solution View → 22

In two separate Young's double-slit experimental set-ups and two monochromatic light sources of different wavelengths are used to get fringes of equal width. The ratios of the slit

JEE Main 2026 Solution View → 23

Which of the following are true for a single slit diffraction? A. Width of central maxima increases with increase in wavelength keeping slit width constant. B. Width of central max

JEE Main 2026 Solution View → 24

Given below are two statements : Statement I : In a Young's double slit experiment, the angular separation of fringes will increase as the screen is moved away from the plane of th

JEE Main 2026 Solution View → 25

In a Young's double slit experiment set up, the two slits are kept 0.4 mm apart and screen is placed at 1 m from slits. If a thin transparent sheet of thickness 20 ~m is introduced

JEE Main 2026 Solution View → 26

In a double slit experiment the distance between the slits is 0.1 cm and the screen is placed at 50 cm from the slits plane. When one slit is covered with a transparent sheet havin

JEE Main 2026 Solution View → 27

A single slit diffraction experiment is performed to determine the slit width using the equation, b d D =m , where b is the slit width, D the shortest distance between the slit and

JEE Advanced 2025 Solution View → 28

In a Young's double slit experiment, a combination of two glass wedges A and B , having refractive indices 1.7 and 1.5, respectively, are placed in front of the slits, as shown in

JEE Advanced 2025 Solution View → 29

In a Young's double slit experiment, the source is white light. One of the slits is covered by red filter and another by a green filter. In this case

JEE Main 2025 Solution View → 30

In a Young's double slit experiment, two slits are located 1.5 mm apart. The distance of screen from slits is 2 m and the wavelength of the source is 400 nm. If the 20 maxima of th

JEE Main 2025 Solution View → 31

Two polarisers P₁ and P₂ are placed in such a way that the intensity of the transmitted light will be zero. A third polariser P₃ is inserted in between P₁ and P ₂ , at the particul

JEE Main 2025 Solution View → 32

In a Young's double slit experiment, the slits are separated by 0.2 mm. If the slits separation is increased to 0.4 mm , the percentage change of the fringe width is:

JEE Main 2025 Solution View → 33

A monochromatic light of frequency 5 10¹⁴ ~Hz travelling through air, is incident on a medium of refractive index ' 2 '. Wavelength of the refracted light will be :

JEE Main 2025 Solution View → 34

Two monochromatic light beams have intensities in the ratio 1:9. An interference pattern is obtained by these beams. The ratio of the intensities of maximum to minimum is

JEE Main 2025 Solution View → 35

Width of one of the two slits in a Young's double slit interference experiment is half of the other slit. The ratio of the maximum to the minimum intensity in the interference patt

JEE Main 2025 Solution View → 36

Two coherent monochromatic light beams of intensities 4I and 9I are superimposed. The difference between the maximum and minimum intensities in the resulting interference pattern i

JEE Main 2025 Solution View → 37

A light wave is propagating with plane wave fronts of the type x+y+z= constant. The angle made by the direction of wave propagation with the x -axis is:

JEE Main 2025 Solution View → 38

If the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right of the central maximum is 30^ in a single slit d

JEE Main 2025 Solution View → 39

Which of the following phenomena can not be explained by wave theory of light?

JEE Main 2025 Solution View → 40

A double slit interference experiment performed with a light of wavelength 600 nm forms an interference fringe pattern on a screen with 10 th bright fringe having its centre at a d

JEE Main 2025 Solution View → 41

Young's double slit inteference apparatus is immersed in a liquid of refractive index 1.44. It has slit separation of 1.5 mm . The slits are illuminated by a parallel beam of light

JEE Main 2025 Solution View → 42

In a Young's double slit experiment, three polarizers are kept as shown in the figure. The transmission axes of P₁ and P₂ are orthogonal to each other. The polarizer P₃ covers both

JEE Main 2025 Solution View → 43

The ratio of the power of a light source S₁ to that the light source S₂ is 2 . S₁ is emitting 2 10¹⁵ photons per second at 600 nm . If the wavelength of the source S₂ is 300 nm , t

JEE Main 2025 Solution View → 44

The Young's double slit interference experiment is performed using light consisting of 480 nm and 600 nm wavelengths to form interference patterns. The least number of the bright f

JEE Main 2025 Solution View → 45

The width of one of the two slits in Young's double slit experiment is d while that of the other slit is x ~d . If the ratio of the maximum to the minimum intensity in the interfer

JEE Main 2025 Solution View → 46

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : In Young's double slit experiment, the fringes produced by

JEE Main 2025 Solution View → 47

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion-(A) : If Young's double slit experiment is performed in an opti

JEE Main 2025 Solution View → 48

Paragraph I: In a Young's double slit experiment, each of the two slits A and B, as shown in the figure, are oscillating about their fixed center and with a mean separation of 0.8

JEE Advanced 2024 Solution View → 49

In a Young's double slit experiment, each of the two slits A and B, as shown in the figure, are oscillating about their fixed center and with a mean separation of 0.8 ~mm . The dis

JEE Advanced 2024 Solution View → 50

A point source S emits unpolarized light uniformly in all directions. At two points A and B , the ratio r=I_A / I_B of the intensities of light is 2. If a set of two polaroids havi

JEE Advanced 2024 Solution View → 51

Monochromatic light of wavelength 500 ~nm is used in Young's double slit experiment. An interference pattern is obtained on a screen. When one of the slits is covered with a very t

JEE Main 2024 Solution View → 52

In a Young's double slit experiment, the intensity at a point is ( 1 4 )^ th of the maximum intensity, the minimum distance of the point from the central maximum is ________ m . (G

JEE Main 2024 Solution View → 53

Two slits are 1 ~mm apart and the screen is located 1 ~m away from the slits. A light of wavelength 500 ~nm is used. The width of each slit to obtain 10 maxima of the double slit p

JEE Main 2024 Solution View → 54

A parallel beam of monochromatic light of wavelength 600 ~nm passes through single slit of 0.4 ~mm width. Angular divergence corresponding to second order minima would be ______ 10

JEE Main 2024 Solution View → 55

Two coherent monochromatic light beams of intensities I and 4 I are superimposed. The difference between maximum and minimum possible intensities in the resulting beam is x I . The

JEE Main 2024 Solution View → 56

In a single slit experiment, a parallel beam of green light of wavelength 550 ~nm passes through a slit of width 0.20 ~mm . The transmitted light is collected on a screen 100 ~cm a

JEE Main 2024 Solution View → 57

Light emerges out of a convex lens when a source of light kept at its focus. The shape of wavefront of the light is :

JEE Main 2024 Solution View → 58

In Young's double slit experiment, carried out with light of wavelength 5000 , the distance between the slits is 0.3 ~mm and the screen is at 200 ~cm from the slits. The central ma

JEE Main 2024 Solution View → 59

The width of one of the two slits in a Young's double slit experiment is 4 times that of the other slit. The ratio of the maximum of the minimum intensity in the interference patte

JEE Main 2024 Solution View → 60

Two wavelengths ₁ and ₂ are used in Young's double slit experiment. ₁=450 ~nm and ₂=650 ~nm . The minimum order of fringe produced by ₂ which overlaps with the fringe produced by ₁

JEE Main 2024 Solution View → 61

In Young's double slit experiment, monochromatic light of wavelength 5000 A ∘ is used. The slits are 1 . 0 mm apart and screen is placed at 1 . 0 m away from slits. The distance fr

JEE Main 2024 Solution View → 62

A microwave of wavelength 2 . 0 cm falls normally on a slit of width 4 . 0 cm . The angular spread of the central maxima of the diffraction pattern obtained on a screen 1 . 5 m awa

JEE Main 2024 Solution View → 63

A monochromatic light of wavelength 6000 A o is incident on the single slit of width 0 . 01 mm . If the diffraction pattern is formed at the focus of the convex lens of focal lengt

JEE Main 2024 Solution View → 64

When unpolarized light is incident at an angle of 60 ° on a transparent medium from air. The reflected ray is completely polarized. The angle of refraction in the medium is

JEE Main 2024 Solution View → 65

Two waves of intensity ratio 1 : 9 cross each other at a point. The resultant intensities at the point, when (a) Waves are incoherent is I 1 b Waves are coherent is I 2 and differ

JEE Main 2024 Solution View → 66

A beam of unpolarised light of intensity I 0 is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of 45 °

JEE Main 2024 Solution View → 67

The diffraction pattern of a light of wavelength 400 nm diffracting from a slit of width 0 . 2 mm is focused on the focal plane of a convex lens of focal length 100 cm . The width

JEE Main 2024 Solution View → 68

In Young's double slit experiment, light from two identical sources are superimposing on a screen. The path difference between the two lights reaching at a point on the screen is 7

JEE Main 2024 Solution View → 69

In a single slit diffraction pattern, a light of wavelength 6000 A o is used. The distance between the first and third minima in the diffraction pattern is found to be 3 mm when th

JEE Main 2024 Solution View → 70

In a double slit experiment shown in figure, when light of wavelength 400 nm is used, dark fringe is observed at P . If D = 0 . 2 m , the minimum distance between the slits S 1 and

JEE Main 2024 Solution View → 71

A parallel beam of monochromatic light of wavelength 5000 A o is incident normally on a single narrow slit of width 0 . 001 mm . The light is focused by convex lens on screen, plac

JEE Main 2024 Solution View → 72

When a polaroid sheet is rotated between two crossed polaroids then the transmitted light intensity will be maximum for a rotation of :

JEE Main 2024 Solution View → 73

A single slit of width a is illuminated by a monochromatic light of wavelength 600 nm . The value of a for which first minimum appears at θ = 30 o on the screen will be :

JEE Main 2023 Solution View → 74

In a Young’s double slit experiment, the ratio of amplitude of light coming from slits is 2 : 1 . The ratio of the maximum to minimum intensity in the interference pattern is

JEE Main 2023 Solution View → 75

The ratio of intensities at two points P and Q on the screen in a Young's double slit experiment where phase difference between two waves of same amplitude are π 3 and &#9

JEE Main 2023 Solution View → 76

Unpolarised light of intensity 32 W m − 2 passes through the combination of three polaroids such that the pass axis of the last polaroids is perpendicular to that of the pass

JEE Main 2023 Solution View → 77

The width of fringe is 2 mm on the screen in a double slit experiment for the light of wavelength of 400 nm . The width of the fringe for the light of wavelength 600 nm will be:

JEE Main 2023 Solution View → 78

A beam of light consisting of two wavelengths 7000   A o and 5500   A o is used to obtain interference pattern in Young's double slit experiment. The distance between

JEE Main 2023 Solution View → 79

As shown in the figure, in Young's double slit experiment, a thin plate of thickness t = 10 μm and refractive index μ = 1 . 2 is inserted infront of slit S 1 . The ex

JEE Main 2023 Solution View → 80

‘ n ’ polarizing sheets are arranged such that each makes an angle 45 ° with the proceeding sheet. An unpolarized light of intensity I is incident into this arrang

JEE Main 2023 Solution View → 81

Two light waves of wavelengths 800 and 600 nm are used in Young's double slit experiment to obtain interference fringes on a screen placed 7 m away from plane of slits. If the

JEE Main 2023 Solution View → 82

Two polaroids A and B are placed in such a way that the pass-axis of polaroids are perpendicular to each other. Now, another polaroid C is placed between A and B bisecting angle be

JEE Main 2023 Solution View → 83

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A : The beam of electrons shows wave nature and exhibit interference

JEE Main 2023 Solution View → 84

In a Young’s double slit experiment, the intensities at two points, for the path difference λ 4 and λ 3 ( λ being the wavelength of light used) are I 1 and I 2

JEE Main 2023 Solution View → 85

In Young’s double slit experiment, two slits S 1 and S 2 are d distance apart and the separation from slits to screen is D (as shown in figure). Now if two transparent slabs

JEE Main 2023 Solution View → 86

Unpolarised light is incident on the boundary between two dielectric media, whose dielectric constants are 2 . 8 (medium – 1 ) and 6 . 8 (medium – 2 ), respectively. To

JEE Main 2023 Solution View → 87

In a Young’s double slit experiment, two slits are illuminated with a light of wavelength 800 nm . The line joining A 1 P is perpendicular to A 1 A 2 as shown in the figure.

JEE Main 2023 Solution View → 88

As shown in figures, three identical polaroids P 1 , P 2 and P 3 are placed one after another. The pass axis of P 2 and P 3 are inclined at angle of 60 º and 90 º with re

JEE Main 2023 Solution View → 89

In Young's double slits experiment, the position of 5 th bright fringe from the central maximum is 5 cm . The distance between slits and screen is 1 m and wavelength of used mo

JEE Main 2023 Solution View → 90

Given below are two statements : Statement I : If the Brewster's angle for the light propagating from air to glass is θ B , then Brewster's angle for the light propaga

JEE Main 2023 Solution View → 91

A double slit setup is shown in the figure. One of the slits is in medium 2 of refractive index n 2 . The other slit is at the interface of this medium with another medium 1 of ref

JEE Advanced 2022 Solution View → 92

An unpolarised light beam of intensity 2 I 0 is passed through a polaroid P and then through another polaroid Q which is oriented in such a way that its passing axis makes an angle

JEE Main 2022 Solution View → 93

In a Young's double slit experiment, a laser light of 560 nm produces an interference pattern with consecutive bright fringes' separation of 7 . 2 mm . Now another light is

JEE Main 2022 Solution View → 94

Two coherent sources of light interfere. The intensity ratio of two sources is 1 : 4 . For this interference pattern if the value of I max + I min I max - I min is equal to 2 &#945

JEE Main 2022 Solution View → 95

Two beams of light having intensities I and 4 I interfere to produce a fringe pattern on a screen. The phase difference between the two beams are π 2 and π 3 at points A

JEE Main 2022 Solution View → 96

In young's double slit experiment, the fringe width is 12 mm . If the entire arrangement is placed in water of refractive index 4 3 , then the fringe width becomes (in mm )

JEE Main 2022 Solution View → 97

In a double slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the plane of slits. If the screen is moved by 5 × 10 - 2 m

JEE Main 2022 Solution View → 98

Using Young's double slit experiment, a monochromatic light of wavelength 5000 Å produces fringes of fringe width 0 . 5 mm . If another monochromatic light of wavelength

JEE Main 2022 Solution View → 99

In young's double slit experiment performed using a monochromatic light of wavelength λ , when a glass plate μ = 1 . 5 of thickness x λ is introduced in the path

JEE Main 2022 Solution View → 100

In a Young's double slit experiment, an angular width of the fringe is 0 . 35 ° on a screen placed at 2 m away for particular wavelength of 450 nm . The angular width of t

JEE Main 2022 Solution View → 101

In Young's double slit experiment the two slits are 0 . 6 mm distance apart. Interference pattern is observed on a screen at a distance 80 cm from the slits. The first dark fri

JEE Main 2022 Solution View → 102

A wave of frequency = 3 GHz , strikes a particle of size 1 100 t h of λ , then this phenomenon is called as

JEE Main 2022 Solution View → 103

The interference pattern is obtained with two coherent light sources of intensity ratio 4 : 1 . And the ratio I max + I min I max - I min is 5 x . Then, the value of x will be equa

JEE Main 2022 Solution View → 104

A light whose electric field vectors are completely removed by using a good polaroid, allowed to incident on the surface of the prism at Brewster's angle. Choose the most suita

JEE Main 2022 Solution View → 105

The two light beams having intensities I and 9 I interfere to produce a fringe pattern on a screen. The phase difference between the beams is π 2 at point P and π at poin

JEE Main 2022 Solution View → 106

Sodium light of wavelengths 650   nm and 655   nm is used to study diffraction at a single slit of aperture 0 . 5   mm . The distance between the slit and the screen

JEE Main 2022 Solution View → 107

Two satellites revolve around a planet in coplanar circular orbits in anticlockwise direction. Their period of revolutions are 1 hour and 8 hours respectively. The radius of the or

JEE Main 2021 Solution View → 108

In a Young's double slit experiment, the slits are separated by 0 . 3   mm and the screen is 1 . 5   m away from the plane of slits. Distance between fourth bright fr

JEE Main 2021 Solution View → 109

The light waves from two coherent sources have same intensity I 1 = I 2 = I 0 . In interference pattern the intensity of light at minima is zero. What will be the intensity of ligh

JEE Main 2021 Solution View → 110

A source of light is placed in front of a screen. The intensity of light on the screen is I . Two Polaroids P 1 and P 2 are so placed in between the source of light and screen that

JEE Main 2021 Solution View → 111

White light is passed through a double slit and interference is observed on a screen 1 . 5   m away. The separation between the slits is 0 . 3   mm . The first violet and

JEE Main 2021 Solution View → 112

The difference in the number of waves when yellow light propagates through air and vacuum columns of the same thickness is one. The thickness of the air column is _____ mm . [Refra

JEE Main 2021 Solution View → 113

In Young's double slit experiment, if the source of light changes from orange to blue then:

JEE Main 2021 Solution View → 114

In the Young's double slit experiment, the distance between the slits varies in time as d t = d 0 + a 0 sin ω t ; where d 0 , ω and a 0 are constants. The difference

JEE Main 2021 Solution View → 115

In Young's double slit arrangement, slits are separated by a gap of 0 . 5 mm , and the screen is placed at a distance of 0 . 5 m from them. The distance between the first and t

JEE Main 2021 Solution View → 116

A fringe width of 6 mm was produced for two slits separated by 1 mm apart. The screen is placed 10 m away. The wavelength of light used is x nm . The value of x to the nearest inte

JEE Main 2021 Solution View → 117

In a Young's double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength 500 nm is used, the fringe separation wi

JEE Main 2021 Solution View → 118

Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter 0 . 1 μ m . If the diameter of the pinhole is slightly increased, it will affect

JEE Main 2021 Solution View → 119

Two coherent light sources having intensity in the ratio 2 x produce an interference pattern. The ratio I max - I min I max + I min will be

JEE Main 2021 Solution View → 120

If the source of light used in a Young's double slit experiment is changed from red to violet:

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