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BITSAT Wave Optics PYQs with Solutions

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

27 questionsPhysics2009–2024Answers + solutions

About Wave Optics PYQs

Wave Optics has 27 previous year questions in the Quantrex Academy BITSAT Physics bank. The 27 questions in this list come from BITSAT (27), spanning 2009 to 2024. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2024: 5
  • 2023: 3
  • 2022: 1
  • 2021: 1
  • 2020: 1
  • 2019: 2
  • 2018: 1
  • 2017: 2
  • 2016: 1
  • 2015: 2
  • 2014: 2
  • 2013: 1

Wave Optics questions with solutions

1

Young's double slit experiment is performed in a medium of refractive index of 1.33. The maximum intensity is I_0 . The intensity at a point on the screen, where path difference

BITSAT 2024 Solution
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2

In YDSE, monochromatic light falls on a screen 1.80 m from two slits separated by 2.08 mm. The first and second order bright fringes are separated by 0.553 mm. The wavelength of

BITSAT 2024 Solution
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3

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 away from

BITSAT 2024 Solution
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4

The property of light which cannot be explained by Huygen's construction of wavefront is

BITSAT 2024 Solution
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5

When a light ray incidents on the surface of a medium, the reflected ray is completely polarized. Then the angle between reflected and refracted rays is

BITSAT 2024 Solution
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6

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

BITSAT 2023 Solution
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7

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 wave of same amplitude are (π)/(3) and (π)/(2)

BITSAT 2023 Solution
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8

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

BITSAT 2023 Solution
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9

In a young's double slit arrangement frings are produced using light of wavelength 4000 Å . One slit is covered by a thin plate of glass of refractive index 1.4 and the other with

BITSAT 2022 Solution
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10

Consider the optical system shown in Fig. The point source of light S is having wavelength equal to λ . The light is reaching screen only after reflection. For point P to besecond

BITSAT 2021 Solution
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11

A thin sheet of glass (μ=1.5) of thickness 6 micron introduced in the path of one of the interfering beams in a double slit experiment shifts the central fringe to a position

BITSAT 2020 Solution
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12

In Young's double-slit experiment, the distance between slits and screen is 2m and distance between slits is 0. 25mm . A light of wavelength 800 nm is used to find fringes on

BITSAT 2019 Solution
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13

Two monochromatic light waves are travelling with same frequency and constant phase difference. If both waves interfere,& then

BITSAT 2019 Solution
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14

In Young's double slit experiment, intensity at a point is ((1)/(4)) of the maximum intensity. Angular position of this point is

BITSAT 2018 Solution
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15

In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ _ 1 = 12000 Å and λ _ 2 = 10000 Å . At what minimum

BITSAT 2017 Solution
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16

The ratio of intensity at the centre of a bright fringe to the intensity at a point distance one-fourth of the distance between two successive bright fringes will be

BITSAT 2017 Solution
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17

In the Young's double-slit experiment, the intensity of light at a point on the screen where the path difference is λ is K,(λ being the wave length of light used). The intensity

BITSAT 2016 Solution
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18

Calculate the wavelength of light used in an interference experiment from the following data: Fringe width =0.03 cm . Distance between the slits and eyepiece through which the

BITSAT 2015 Solution
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19

In a YDSE, the light of wavelength λ=5000 Ã is used, which emerges in phase from two slits a distance d=3 × 10^ -7 m apart. Atransparent sheet of thickness t=1.5 × 10^ -7 m

BITSAT 2015 Solution
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20

The angular size of the central maxima due to a single slit diffraction is a arrow slit width )

BITSAT 2014 Solution
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21

Find the final intensity of light (I"), if the angle between the axes of two polaroids is 60^ ^ ∘ .

BITSAT 2014 Solution
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22

In Young's double slit experiment 10 th order maximum is obtained at the point of observation in the interference pattern for λ=7000 . If the source is replaced by another one of

BITSAT 2013 Solution
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23

A mica slit of thickness t and refractive index μ is introduoed in theray from the first source S_ 1 . By how much distance of fringes pattern will be displaced?

BITSAT 2012 Solution
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24

In a Young's double slit experiment the angular width of a fringe formed on a distant screen is 1^ ^ ∘ . The wavelength fo the light used is 6280 . What is the distance between

BITSAT 2012 Solution
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25

If the distance between the first maxima and fifth minima of a double slit pattern is 7 mm and the slits are separated by 0.15 mm with the screen 50 cm. from the slits, then the

BITSAT 2011 Solution
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26

When a mica sheet of thickness 7 microns and μ=1.6 is placed in the path of one of interfering beams in the biprism experiment then the central fringe gets at the position of

BITSAT 2009 Solution
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27

In Young's double slit experiment, if the slit widths are in the ratio 1: 2, the ratio of the intensities at minima and maxima will be

BITSAT 2009 Solution
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