Jump to a section

Physics - Wave Optics

Practise 27 BITSAT previous year questions on Wave Optics, compiled from papers spanning 2009 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty BITSAT tests.

Wave Optics has been asked in 15 of the 16 years of BITSAT papers analysed (2009–2024), with 27 questions in all. 26% of them were easy, 48% moderate and 26% tough. Most of its questions came from 2024, with 5 questions that year. In the last three years (2022–2024) it had 9 questions across 6 papers, about 1.5 per paper.

The chapter's 5 topics are not weighted equally: Youngs Double Slit Experiment (18 questions, 67%), Diffraction of Light (3 questions, 11%), and Interference of Light (3 questions, 11%) have been asked the most. Youngs Double Slit Experiment has also led over the last five years, with 6 questions. Youngs Double Slit Experiment has produced the most tough questions (4).

  1. 1The property of light which cannot be explained by Huygen's construction of wavefront is2024 (Memory Based Paper 1)Wave Theory and Wavefronts
  2. 2When a light ray incidents on the surface of a medium, the reflected ray is completely polarized. Then the angle between reflected and refra2024 (Memory Based Paper 1)Polarization of Light
  3. 3A 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 patt2024 (Memory Based Paper 2)Diffraction of Light
  4. 4Young's double slit experiment is performed in a medium of refractive index of 1.33 . The maximum intensity is . The intensity at a point on2024 (Memory Based Paper 3)Youngs Double Slit Experiment
  5. 5In 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 se2024 (Memory Based Paper 3)Youngs Double Slit Experiment
  6. 6The ratio of intensities at two points and on the screen in a Young's double slit experiment where phase difference between two wave of same2023 (Memory Based Paper 1)Youngs Double Slit Experiment
  7. 7In a Young's double slit experiment, the intensities at two points, for the path difference and ( being the wavelength of light used) are an2023 (Memory Based Paper 1)Youngs Double Slit Experiment
  8. 8A single slit of a width is illuminated by a monochromatic light of wavelength . The value of ' ' for which first minimum appears at on the 2023 (Memory Based Paper 2)Diffraction of Light
  9. 9In a young's double slit arrangement frings are produced using light of wavelength . One slit is covered by a thin plate of glass of refract2022Youngs Double Slit Experiment
  10. 10Consider the optical system shown in Fig. The point source of light is having wavelength equal to . The light is reaching screen only after 2021Diffraction of Light
  11. 11A thin sheet of glass of thickness 6 micron introduced in the path of one of the interfering beams in a double slit experiment shifts the ce2020Youngs Double Slit Experiment
  12. 12In Young s double-slit experiment, the distance between slits and screen is 2 m and distance between slits is 0 . 25 mm . A light of wavelen2019Youngs Double Slit Experiment
  13. 13Two monochromatic light waves are travelling with same frequency and constant phase difference. If both waves interfere, then2019Interference of Light
  14. 14In Young s double slit experiment, intensity at a point is 1 4 of the maximum intensity. Angular position of this point is2018Youngs Double Slit Experiment
  15. 15In Young s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths 1 = 12000 and 2 = 10000 . At w2017Youngs Double Slit Experiment
  16. 16The ratio of intensity at the centre of a bright fringe to the intensity at a point distance one-fourth of the distance between two successi2017Youngs Double Slit Experiment
  17. 17In the Young's double-slit experiment, the intensity of light at a point on the screen where the path difference is is being the wave length2016Youngs Double Slit Experiment
  18. 18Calculate the wavelength of light used in an interference experiment from the following data: Fringe width . Distance between the slits and 2015Interference of Light
  19. 19In a YDSE, the light of wavelength is used, which emerges in phase from two slits a distance apart. Atransparent sheet of thickness refracti2015Youngs Double Slit Experiment
  20. 20The angular size of the central maxima due to a single slit diffraction is slit width2014Youngs Double Slit Experiment
  21. 21Find the final intensity of light (I"), if the angle between the axes of two polaroids is .2014Polarization of Light
  22. 22In Young's double slit experiment 10 th order maximum is obtained at the point of observation in the interference pattern for . If the sourc2013Youngs Double Slit Experiment
  23. 23A mica slit of thickness t and refractive index is introduoed in theray from the first source S . By how much distance of fringes pattern wi2012Youngs Double Slit Experiment
  24. 24In a Young's double slit experiment the angular width of a fringe formed on a distant screen is . The wavelength fo the light used is . What2012Youngs Double Slit Experiment
  25. 25If the distance between the first maxima and fifth minima of a double slit pattern is and the slits are separated by with the screen 50 from2011Youngs Double Slit Experiment
  26. 26When a mica sheet of thickness 7 microns and is placed in the path of one of interfering beams in the biprism experiment then the central fr2009Interference of Light
  27. 27In Young's double slit experiment, if the slit widths are in the ratio the ratio of the intensities at minima and maxima will be2009Youngs Double Slit Experiment

Frequently Asked Questions

1.How many questions are available for Wave Optics?

This chapter includes 27 questions compiled from BITSAT papers spanning 2009 to 2024.

2.Are these questions only from BITSAT, or from other exams too?

These are BITSAT questions specifically for the Wave Optics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Wave Optics an important chapter for BITSAT Physics?

Wave Optics has appeared in 15 of the 16 years of BITSAT papers covered here, with 27 questions across 18 papers - about 2 per paper it appears in.

4.What is the difficulty level of Wave Optics questions in BITSAT?

Of the 27 questions analysed for this chapter, 26% are easy, 48% moderate and 26% tough. 2024 had the most, with 5 questions.

5.Which topics in Wave Optics should I focus on?

These topics have carried the most weightage in Wave Optics:

  • Youngs Double Slit Experiment - 18 questions (67%)
  • Diffraction of Light - 3 questions (11%)
  • Interference of Light - 3 questions (11%)
  • Youngs Double Slit Experiment has produced the most tough questions (4).
6.Is Wave Optics's weightage in BITSAT going up or down?

Across all 18 papers analysed, Wave Optics has averaged about 1.5 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.5 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.