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Physics - Wave Optics

Practise 68 KCET previous year questions on Wave Optics, compiled from papers spanning 2007 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 KCET tests.

Wave Optics has been asked in 20 of the 20 years of KCET papers analysed (2007–2026), with 68 questions in all. 51% of them were easy, 32% moderate and 16% tough. Most of its questions came from 2008, with 7 questions that year. In the last three years (2024–2026) it had 4 questions across 3 papers, about 1.3 per paper.

The chapter's 5 topics are not weighted equally: Youngs Double Slit Experiment (26 questions, 38%), Polarization of Light (16 questions, 24%), and Diffraction of Light (15 questions, 22%) have been asked the most. Youngs Double Slit Experiment has also led over the last five years, with 4 questions. Youngs Double Slit Experiment has produced the most tough questions (7).

  1. 1In Young's double slit experiment, how many maxima can be seen on a screen (including central maxima) if (where is wavelength of light and i2026Youngs Double Slit Experiment
  2. 2If is incident plane wave front then refracted wave front in2025Wave Theory and Wavefronts
  3. 3Three polaroid sheets are co-axially placed as indicated in the diagram. Pass axes of the polaroids 2 and 3 make and with pass axis of polar2024Polarization of Light
  4. 4In Young's double slit experiment, an electron beam is used to produce interference fringes of width . Now the electron beam is replaced by 2024Youngs Double Slit Experiment
  5. 5When light propagates through a given homogeneous medium, the velocities of2023Wave Theory and Wavefronts
  6. 6An unpolarised light of intensity is passed through two polaroids kept one after the other with their planes parallel to each other. The int2023Polarization of Light
  7. 7In the Young's double slit experiment, the intensity of light passing through each of the two double slits is . The screen-slit distance is 2023Youngs Double Slit Experiment
  8. 8For light diverging from a finite point source,2022Wave Theory and Wavefronts
  9. 9The fringe width for red colour as compared to that for violet colour is approximately2022Youngs Double Slit Experiment
  10. 10In case of Fraunhoffer diffraction at a single slit, the diffraction pattern on the screen is correct for which of the following statements?2022Diffraction of Light
  11. 11When a compact disc(CD) is illuminated by small source of white light coloured bands are observed. This is due to2022Diffraction of Light
  12. 12A slit of width is illuminated by red light of wavelength . If the first diffraction minimum falls at , then the value of is2021Diffraction of Light
  13. 13Which of the following statements are correct with reference to single slit diffraction pattern?2021Diffraction of Light
  14. 14In the Young's double slit experiment a monochromatic source of wavelength is used. The intensity of light passing through each slit is . Th2021Youngs Double Slit Experiment
  15. 15Three polaroid sheets and are kept parallel to each other such that the angle between pass axes of and is and that between and is . If unpol2020Polarization of Light
  16. 16In Young's double slit experiment, the distance between the slits and the screen is and the distance between the two slits is . If a thin tr2020Youngs Double Slit Experiment
  17. 17A transparent medium shows relation between \( i \) and \( r \) as shown. If the speed of light in vacuum is \( c \) the Brewster angle for 2019Polarization of Light
  18. 18In Young's double slit experiment using monochromatic light of wavelength \( \), the intensity of light at a point on the screen where path 2019Youngs Double Slit Experiment
  19. 19A plane wavefront of wavelength \( \) is incident on a slit of width \( {a} \). The angular width of principle maximum is2018Diffraction of Light
  20. 20In a Fraunhofer diffraction at a single slit, if yellow light illuminating the slit is replaced by blue light, then diffraction bands2018Diffraction of Light
  21. 21In Young's double slit experiment, two wavelengths \( _{1}=780 {~nm} \) and \( _{2}=520 {~nm} \) are used to obtain interferance fringes. If2018Youngs Double Slit Experiment
  22. 22In Young's double slit experiment, slits are separated by \( 2 {~mm} \) and the screen is placed at a distance of \( 1.2 {~m} \) from the sl2018Youngs Double Slit Experiment
  23. 23Two point charges \( A=+3 {nC} \) and \( B=+1 {nC} \) are placed \( 5 {~cm} \) apart in air. The work done to move charge \( B \) towards \(2017Wave Theory and Wavefronts
  24. 24A coil of inductive reactance \( {1}{ {3}} \) and resistance \( 1 \) is connected to a \( 200 {~V}, 50 {~Hz} \) ac. supply. The time lag bet2017Youngs Double Slit Experiment
  25. 25In Young's double-slit experiment if yellowlight is replaced by blue light, the interferencefringes become2017Polarization of Light
  26. 26In a system of two crossed polarisers, it is found that the intensity of light from the second polariser is half from that of first polarise2017Polarization of Light
  27. 27Which of the following logic gates is considered as 'universal' ?2017Youngs Double Slit Experiment
  28. 28In Young's double slit experiment the source is white light. One slit is covered with red filter and the other with blue filter. There shall2016Youngs Double Slit Experiment
  29. 29Light of wavelength \( 600 {~nm} \) is incident normally on a slit of width \( 0.2 {~mm} \). The angular width of central maxima in the diff2016Diffraction of Light
  30. 30The polarizing angle of glass is \( 57^{ } \). A ray of light which is incident at this angle will have an angle of refraction as2015Youngs Double Slit Experiment
  31. 31A radioactive decay can form an isotope of the original nucleus with the emission of particles2015Polarization of Light
  32. 32An LED is constructed from a pn junction based on a certain semi-conducting material whose energy gap is \( 1.9 {eV} \). Then the wavelength2015Diffraction of Light
  33. 33A cycle tyre bursts suddenly. What is the type of this process?2014Youngs Double Slit Experiment
  34. 34A focal length of a lens is \( 10 {~cm} \). What is power of a lens in dioptre ?2014Polarization of Light
  35. 35Which of the following phenomena support the wave theory of light? (1) Scattering (2) Interference (3) Diffraction (4) Velocity of light in 2013Wave Theory and Wavefronts
  36. 36White light reflected from a soap film (Refractive Index ) has a maxima at and a minima at with no minimum in between. Then the thickness of2013Youngs Double Slit Experiment
  37. 37A cylindrical tube of length and radius with sugar solution of concentration produce a rotation of in the plane of vibration of a plane pola2013Polarization of Light
  38. 38and are used to illuminate the slits. and are the corresponding fringe widths. The wavelength can produce photoelectric effect when incident2013Youngs Double Slit Experiment
  39. 39In Young's double slit experiment, fringes of width are produced on a screen kept at a distance of from the slit. When the screen is moved a2012Youngs Double Slit Experiment
  40. 40For sustained interference fringes in double slit experiment, essential condition/s is/are 1. sources must be coherent. 2. the intensities o2012Youngs Double Slit Experiment
  41. 41In single slit experiment, the width of the slit is reduced. Then, the linear width of the principal maxima2012Diffraction of Light
  42. 42If the two slits in Young's double slit experiment are of unequal width, then2012Youngs Double Slit Experiment
  43. 43The phenomenon of polarization shows that light has ......... nature.2012Polarization of Light
  44. 44Wavefront is the locus of all points, where the particles of the medium vibrate with the same2011Wave Theory and Wavefronts
  45. 45Two monochromatic light waves of amplitudes and interfering at a point have a phase difference of . The intensity at that point will be prop2011Interference of Light
  46. 46Consider the following statements in case of Young's double slit experiment. (1) A slit is necessary if we use an ordinary extended source o2011Youngs Double Slit Experiment
  47. 47A parallel beam of light of wavelength gets diffracted by a single slit of width . The angular position of the first minima of diffracted li2011Diffraction of Light
  48. 48The critical angle of a certain medium is . The polarizing angle of the medium is2011Polarization of Light
  49. 49Red light of wavelength is incident normally on an optical diffraction grating with lines . Including central principal maxima, how many max2010Diffraction of Light
  50. 50The wavelength of the light used in Young's double slit experiment is . The intensity at a point on the screen is I, where the path differen2010Youngs Double Slit Experiment

Frequently Asked Questions

1.How many questions are available for Wave Optics?

This chapter includes 68 questions compiled from KCET papers spanning 2007 to 2026.

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

These are KCET 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 KCET Physics?

Wave Optics has appeared in 20 of the 20 years of KCET papers covered here, with 68 questions across 20 papers - about 3 per paper it appears in.

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

Of the 68 questions analysed for this chapter, 51% are easy, 32% moderate and 16% tough. 2008 had the most, with 7 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 - 26 questions (38%)
  • Polarization of Light - 16 questions (24%)
  • Diffraction of Light - 15 questions (22%)
  • Youngs Double Slit Experiment has produced the most tough questions (7).
6.Is Wave Optics's weightage in KCET going up or down?

Across all 20 papers analysed, Wave Optics has averaged about 3.4 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.