Wave Optics — JEE Main Previous Year Questions

How many JEE Main questions come from Wave Optics?

Wave Optics has contributed 159 questions to Joint Entrance Examination (Main) papers between 2016 and 2026 — an average of about 14 questions a year. That count is measured from EByAi’s bank of 55,289 JEE Main questions, not estimated from a syllabus. Every one of the 159 questions carries a written, step-by-step solution, and each is tagged to Wave Optics within Physics, so you can drill this chapter across every year at once instead of hunting through paper PDFs. Practising a chapter’s full PYQ history is the fastest way to learn the patterns examiners reuse.

Sample Wave Optics questions from real JEE Main papers

These are 5 real questions from the bank — exactly as asked, with the answer one tap away. All 159 Wave Optics questions (with full written solutions) are available in practice.

1. Question 1 · JEE Main 2025

   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:
   1. (A)there shall be alternate interference fringes of red and green.
   2. (B)there shall be an interference pattern for red distinct from that for green.
   3. (C)there shall be an interference pattern, where each fringe's pattern center is green and outer edges are red.
   4. (D)there shall be no interference fringes.
   Show answerAnswer

   Answer: (D) there shall be no interference fringes.

2. Question 2 · JEE Main 2025

   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 :
   1. (A)$25\%$
   2. (B)$50\%$
   3. (C)$0\%$
   4. (D)$100\%$
   Show answerAnswer

   Answer: (B) $50\%$

3. Question 3 · JEE Main 2025

   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
   1. (A)$8:1$
   2. (B)$4:1$
   3. (C)$3:1$
   4. (D)$9:1$
   Show answerAnswer

   Answer: (B) $4:1$

4. Question 4 · JEE Main 2025

   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 pattern is :
   1. (A)$3:1$
   2. (B)$(2\sqrt{2}+1):(2\sqrt{2}-1)$
   3. (C)$9:1$
   4. (D)$(3+2\sqrt{2}):(3-2\sqrt{2})$
   Show answerAnswer

   Answer: (D) $(3+2\sqrt{2}):(3-2\sqrt{2})$

5. Question 5 · JEE Main 2025

   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 fringes of 480 nm light that are required for the first coincidence with the bright fringes formed by 600 nm light is
   1. (A)8
   2. (B)4
   3. (C)5
   4. (D)6
   Show answerAnswer

   Answer: (C) 5

Wave Optics questions by year

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