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Physics - Wave Optics

Practise 77 COMEDK previous year questions on Wave Optics, compiled from papers spanning 2012 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty COMEDK tests.

Wave Optics has been asked in 15 of the 15 years of COMEDK papers analysed (2012–2026), with 77 questions in all. 30% of them were easy, 60% moderate and 10% tough. Most of its questions came from 2024, with 13 questions that year. In the last three years (2024–2026) it had 31 questions across 10 papers, about 3.1 per paper.

The chapter's 6 topics are not weighted equally: Youngs Double Slit Experiment (30 questions, 39%), Diffraction of Light (21 questions, 27%), and Polarization of Light (13 questions, 17%) have been asked the most. Youngs Double Slit Experiment has also led over the last five years, with 20 questions. Youngs Double Slit Experiment has produced the most tough questions (5).

  1. 1A diffraction pattern due to a single slit of width 0.12mm is obtained with a blue green light of wavelength 500 nm. The angular separation 09 May, 2026 (S1)Diffraction of Light
  2. 2In a Young's double slit experiment, the slit separation is 1.5 mm. The setup is illuminated simultaneously by light of wavelengths 6000 Å a09 May, 2026 (S1)Youngs Double Slit Experiment
  3. 3In a Young's double slit experiment, the slits are separated by 0.5 mm. Fringes are obtained on a screen which is placed at distance 1 m awa09 May, 2026 (S1)Young's Double Slit Experiment
  4. 4If the intensity of the central maximum in the Young's double slit experiment is , what will be the intensity at the same region when one of09 May, 2026 (S2)Youngs Double Slit Experiment
  5. 5The width of the fringes obtained with a light of wave length m is 1.82 mm. If the whole apparatus is immersed in a liquid of refractive ind09 May, 2026 (S2)Young's Double Slit Experiment
  6. 6In a single slit diffraction experiment, the diffraction pattern is observed on a screen placed at a distance of 2m from the slit of 1mm wid09 May, 2026 (S2)Diffraction of Light
  7. 7In a YDSE, the distance between the two slits is 2 mm and the wavelength of incident light is 578.9 nm . Path difference between the waves f25 May, 2025 (Shift)Youngs Double Slit Experiment
  8. 8In a Young's double slit experiment, the two interfering waves forming the interference pattern have the same amplitude. The phase differenc25 May, 2025 (Shift)Youngs Double Slit Experiment
  9. 9A parallel beam of monochromatic light of wavelength 800 nm passes through a single slit of 0.25 mm width. The angular divergence correspond25 May, 2025 (Shift)Diffraction of Light
  10. 10In a single slit Fraunhofer diffraction pattern obtained at normal incidence, at the angular position of the first diffraction minimum the p10 May, 2025 (S1)Diffraction of Light
  11. 11If is the amplitude of the electric field of the waves starting from the slits in a double slit experiment and is the phase difference betwe10 May, 2025 (S1)Youngs Double Slit Experiment
  12. 12Two coherent waves of intensities and pass through a region at the same time in the same direction. The sum of maximum to minimum intensitie10 May, 2025 (S1)Interference of Light
  13. 13In the Young's double slit experiment, when a monochromatic light is used, fringe width obtained is 1 mm . If the wave length is halved and 10 May, 2025 (S2)Youngs Double Slit Experiment
  14. 14An EM wave of frequency falls normally on a rectangular slit of width . What is the total angular width of the central maxima?10 May, 2025 (S2)Diffraction of Light
  15. 15A monochromatic light of wavelength is passed through two media A and B of thickness 10 cm and 16 cm respectively. The number of waves in is10 May, 2025 (S2)Wave Theory and Wavefronts
  16. 16Young's double slit experiment is first done in air and then in a medium of refractive index . If the 8th dark fringe in the medium lies whe10 May, 2025 (S3)Youngs Double Slit Experiment
  17. 17The wavelength of a monochromatic light which is used in single slit diffraction is 800 nm . The width of the single slit for which the firs10 May, 2025 (S3)Diffraction of Light
  18. 18The interference pattern is obtained with two coherent light sources of intensity ratio . The ratio of is . The values of and are:10 May, 2025 (S3)Interference of Light
  19. 19In Young's double slit experiment the ratio of phase difference between light waves reaching the third bright fringe and third dark fringe i2024 (Afternoon Shift)Youngs Double Slit Experiment
  20. 20A slit of width is illuminated by light of wavelength . Angular position of the first minimum is2024 (Afternoon Shift)Diffraction of Light
  21. 21In Young's double slit experiment, the intensity of light at a point on the screen where the path difference is is units ( is the wavelength2024 (Afternoon Shift)Youngs Double Slit Experiment
  22. 22In Young's double slit experiment, the ratio of intensities of light from one slit to the other is . If Im is the maximum intensity, what is2024 (Afternoon Shift)Youngs Double Slit Experiment
  23. 23A monochromatic light of wavelength is incident normally on a single slit of width to produce a diffraction pattern on a screen placed away.2024 (Evening Shift)Youngs Double Slit Experiment
  24. 24In Young's double slit experiment light of wavelength is used to form interference pattern. A uniform glass plate of refractive index 1.5 an2024 (Evening Shift)Young's Double Slit Experiment
  25. 25Incident light of wavelength produces a diffraction pattern on a screen away when it passes through a single slit of width . The distance be2024 (Evening Shift)Diffraction of Light
  26. 26Two narrow parallel slits illuminated by a coherent monochromatic light produces an interference pattern on a screen placed at a distance fr2024 (Evening Shift)Youngs Double Slit Experiment
  27. 27In Young's double slit experiment, the separation between two slits is . When light beam is passed through the two slits, then interference 2024 (Memory Based)Youngs Double Slit Experiment
  28. 28The width of the fringes obtained in the Young's double slit experiment is when light of wave length is used. If the whole apparatus is imme2024 (Morning Shift)Youngs Double Slit Experiment
  29. 29In the Young's double slit experiment bright for red coincides with bright for violet. Then the value of ' ' is: (given: wave length of red 2024 (Morning Shift)Youngs Double Slit Experiment
  30. 30When light wave passes from a medium of refractive index ' ' to another medium of refractive index ' ' the phase change occurs to the light 2024 (Morning Shift)Wave Theory and Wavefronts
  31. 31In a single slit diffraction experiment, for slit width ' ' the width of the central maxima is ' '. If we double the slit width then the cor2024 (Morning Shift)Diffraction of Light
  32. 32In the young's double slit experiment the fringe width of the interference pattern is found to be , when the light of wave length is used. W2023 (Evening Shift)Youngs Double Slit Experiment
  33. 33A light having wavelength is incident normally on a slit of width . Then the linear width of the central maximum on the screen kept from the2023 (Evening Shift)Diffraction of Light
  34. 34In Young's double slit interference experiment, using two coherent waves of different amplitudes, the intensities ratio between bright and d2023 (Memory Based)Interference of Light
  35. 35In Young's double slit experiment, the ratio of maximum and minimum intensities in the fringe system is . The ratio of amplitudes of coheren2023 (Memory Based)Youngs Double Slit Experiment
  36. 36In Young's double slit interference experiment, using two coherent waves of different amplitudes, the intensities ratio between bright and d2023 (Morning Shift)Youngs Double Slit Experiment
  37. 37In Young's double slit experiment, the ratio of maximum and minimum intensities in the fringe system is . The ratio of amplitudes of coheren2023 (Morning Shift)Interference of Light
  38. 38In Young's double slit experiment, the two slits are separated by and they are from the screen. The wavelength of the light used is . The di2022Youngs Double Slit Experiment
  39. 39In Young's double slit experiment, the fringe width is found to be . If the whole apparatus is immersed in a liquid of refractive index with2022Youngs Double Slit Experiment
  40. 40An unpolarised beam of intensity is incident on a pair of nicols making an angle of with each other. The intensity of light emerging from th2021Polarization of Light
  41. 41In Young's double slit experiment with sodium vapour lamp of wavelength and slit apart, the half angular width of the central maxima is2021Youngs Double Slit Experiment
  42. 42Two identical light waves, propagating in the same direction, have a phase difference . After they superpose the intensity of the resulting 2020Interference of Light
  43. 43A plastic sheet (refractive index ) covers one slit of a double slit arrangement for the Young's experiment. When the double slit is illumin2020Youngs Double Slit Experiment
  44. 44When light is incident on a diffraction grating, the zero order principal maximum will be2019Diffraction of Light
  45. 45H-polaroid is prepared by2019Polarization of Light
  46. 46A beam of light of wavelength from a distant source falls on a single slit wide and the resulting diffraction pattern is observed on a scree2019Diffraction of Light
  47. 47Specific rotation of sugar solution is SI units. of impure sugar solution is taken in a polarimeter tube of length and an optical rotation o2019Polarization of Light
  48. 48In Young's double slit experiment, if monochromatic light used is replaced by white light, then2019Youngs Double Slit Experiment
  49. 49In a Young's double slit experiment, the separation between the two slits is and the fringes are observed away. If it produces the second da2019Youngs Double Slit Experiment
  50. 50In Young's double slit experiment, a third slit is made in between the double slits. Then,2018Youngs Double Slit Experiment

Frequently Asked Questions

1.How many questions are available for Wave Optics?

This chapter includes 77 questions compiled from COMEDK papers spanning 2012 to 2026.

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

These are COMEDK 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 COMEDK Physics?

Wave Optics has appeared in 15 of the 15 years of COMEDK papers covered here, with 77 questions across 24 papers - about 3 per paper it appears in.

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

Of the 77 questions analysed for this chapter, 30% are easy, 60% moderate and 10% tough. 2024 had the most, with 13 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 - 30 questions (39%)
  • Diffraction of Light - 21 questions (27%)
  • Polarization of Light - 13 questions (17%)
  • Youngs Double Slit Experiment has produced the most tough questions (5).
6.Is Wave Optics's weightage in COMEDK going up or down?

Across all 24 papers analysed, Wave Optics has averaged about 3.2 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 3.1 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.