NEET Physics Kotaby Prashant Sir

Wave Optics for NEET

Class 12 · What NEET asks, the NCERT lines it repeats, and where to study it free

Wave Optics in NEET: the numbers

59NEET / AIPMT questions in our PYQ bank (1988–2025)
27exam years with a question from this chapter
5NCERT lines NEET asked more than once

Topics NEET asks most

TopicQuestions
Interference and Young's double slit 25
Diffraction 14
Polarisation 12
Huygens principle 8

NCERT lines NEET asked again and again

Read these lines from your NCERT book twice: NEET has built questions on each of them more than once.

Fringe width is β = λD/d: it grows with screen distance and wavelength and shrinks with slit separation . Dipping the set-up in a liquid divides it by n.
AIPMT 1990NEET 2013NEET 2020NEET 2022
Unpolarised light loses half its intensity at the first polaroid. Each later polaroid then multiplies by cos ²θ of the angle between neighbouring axes.
NEET 2017NEET 2022NEET 2024NEET 2025
On entering a denser medium the frequency stays the same , while speed and wavelength both fall by the factor n: v = c/n, λ' = λ/n.
AIPMT 1997AIPMT 2001AIPMT 2007
In a single slit, a sin θ = nλ gives minima , not maxima. At the first minimum the edge wavelets differ by π from the midpoint, and by 2nπ between the two edges.
NEET 2013NEET 2015NEET 2016
At the Brewster angle, tan i_B = n, reflected and refracted rays are at 90°. The reflected light is fully polarised , the refracted light only partially.
NEET 2018NEET 2024NEET 2025

Free lecture by Prashant Sir

WAVE OPTICS L-16 | NEET Physics Crash Course | NCERT Physics Class 12 · 304K views on YouTube

Free NCERT notes for Wave Optics

Light as a wave: Huygens wavefronts, Young's double slit, single-slit diffraction and polarisation. NEET usually asks one or two questions here, mostly direct numericals on fringe width, intensity ratio, central maximum width and Malus/Brewster law.

Read the chapter notes: key NCERT points, graphs, every formula with its meaning, tricks, common mistakes and NEET traps.

FAQ

How many questions come from Wave Optics in NEET?

Our bank of NEET and AIPMT papers (1988–2025) has 59 questions from Wave Optics, most of them from Interference and Young's double slit, Diffraction, Polarisation.

Which NCERT line of Wave Optics has NEET asked the most?

This line has been asked 4 times in NEET/AIPMT: "Fringe width is β = λD/d: it grows with screen distance and wavelength and shrinks with slit separation. Dipping the set-up in a liquid divides it by n."

Where can I study Wave Optics for NEET for free?

Prashant Sir's full lecture is free on the NEET Physics Kota YouTube channel, and the chapter notes are free on Dhruv.