In interference and diffraction, the light energy is redistributed. If it reduces in one region, producing a dark fringe, it increases in another region, producing a bright fringe. A. As there is no gain or loss of energy, these phenomena are consistent with the principle of conservation of energy. B. Diffraction and interference are characteristics exhibited only by light waves. Choose the correct answer from the options given below:

$A$ is true and $B$ is also true

If the monochromatic source in Young's double slit experiment is replaced by white light, then

There will be a central bright white fringe surrounded by a few coloured fringes

Interference pattern will disappear

There will be a central dark fringe surrounded by a few coloured fringes

All bright fringes will be of equal width

For Young's double slit experiment, two statements are given below : Statement I : If the screen is moved away from the plane of slits, angular separation of the fringes remains constant. Statement II : If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases. In the light of the above statements, choose the correct answer from the options given below :

Statement I is true but Statement II is false

Both Statement I and Statement II are false

Statement I is false but Statement II is true

Both Statement I and Statement II are true

If the screen is moved away from the plane of the slits in a Young's double slit experiment, then the :

linear separation of the fringes increases

linear separation of the fringes decreases

angular separation of the fringes increases

angular separation of the fringes decreases

Wave Optics — NEET Previous Year Questions

26 solved PYQs · 2016–2026 · Physics

Solved PYQs: 26
Years covered: 2016–2026
Avg / year: ~3
Subject: Physics

How many NEET questions come from Wave Optics?

Wave Optics has contributed 26 questions to National Eligibility cum Entrance Test (UG) papers between 2016 and 2026 — an average of about 3 questions a year. That count is measured from EByAi’s bank of 46,150 NEET questions, not estimated from a syllabus. Every one of the 26 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 NEET papers

These are 5 real questions from the bank — exactly as asked, with the answer one tap away. All 26 Wave Optics questions (with full written solutions) are available in practice.

Question 1 · NEET 2026
In interference and diffraction, the light energy is redistributed. If it reduces in one region, producing a dark fringe, it increases in another region, producing a bright fringe.

A. As there is no gain or loss of energy, these phenomena are consistent with the principle of conservation of energy.

B. Diffraction and interference are characteristics exhibited only by light waves.

Choose the correct answer from the options given below:
1. (A) $A is true and B is also true$
2. (B) $A is false, but B is true$
3. (C) $A is true, but B is false$
4. (D) $Both A and B are false$
Show answerAnswer
$Answer: (C) A is true, but B is false$
Question 2 · NEET 2024
If the monochromatic source in Young's double slit experiment is replaced by white light, then
1. (A) $Interference pattern will disappear$
2. (B) $There will be a central dark fringe surrounded by a few coloured fringes$
3. (C) $There will be a central bright white fringe surrounded by a few coloured fringes$
4. (D) $All bright fringes will be of equal width$
Show answerAnswer
$Answer: (C) There will be a central bright white fringe surrounded by a few coloured fringes$
Question 3 · NEET 2023
For Young's double slit experiment, two statements are given below :

Statement I : If the screen is moved away from the plane of slits, angular separation of the fringes remains constant.

Statement II : If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.

In the light of the above statements, choose the correct answer from the options given below :
1. (A) $Both Statement I and Statement II are false$
2. (B) $Statement I is true but Statement II is false$
3. (C) $Statement I is false but Statement II is true$
4. (D) $Both Statement I and Statement II are true$
Show answerAnswer
$Answer: (B) Statement I is true but Statement II is false$
Question 4 · NEET 2022
If the screen is moved away from the plane of the slits in a Young's double slit experiment, then the :
1. (A) $linear separation of the fringes decreases$
2. (B) $angular separation of the fringes increases$
3. (C) $angular separation of the fringes decreases$
4. (D) $linear separation of the fringes increases$
Show answerAnswer
$Answer: (D) linear separation of the fringes increases$
Question 5 · NEET 2022
In a Young's double slit experiment, a student observes 8 fringes in a certain segment of screen when a monochromatic light of 600 nm wavelength is used. If the wavelength of light is changed to 400 nm, then the number of fringes he would observe in the same region of the screen is
1. (A) $6$
2. (B) $8$
3. (C) $9$
4. (D) $12$
Show answerAnswer
$Answer: (D) 12$

Wave Optics questions by year

Year	Questions	Share of chapter questions
2026	2
2025	2
2024	5
2023	2
2022	3
2020	2
2019	1
2018	2
2017	3
2016	4

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FAQs

How many NEET questions have been asked from Wave Optics?

EByAi's bank holds 26 real NEET questions from Wave Optics, asked between 2016 and 2026 — about 3 per year on average. Every count is measured from actual papers, not estimated.

Is Wave Optics important for NEET?

26 questions over 10 papers make Wave Optics a steady-weightage chapter in NEET Physics. The year-wise table above shows exactly how often it appears.

Can I solve Wave Optics PYQs online for free?

Yes. EByAi lets you solve NEET past-year questions in the browser with written solutions — free daily practice, no card needed.

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