NEET UG 2025 · Physics · Question 27
NEET 2025 Physics, question 27
Question 27 of the NEET 2025 paper (code 45) is a Physics question from Wave Optics. Its idea, Polarisation and Malus's Law, was asked 6 times, in 2017, 2018, 2020, 2024 and 2025, across NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q27 · Physics
An unpolarized light beam travelling in air is incident on a medium of refractive index 1.73 at Brewster's angle. Then-
- 1reflected light is completely polarized and the angle of reflection is close to 60°Official answer
- 2reflected light is partially polarized and the angle of reflection is close to 30°
- 3both reflected and transmitted light are perfectly polarized with angles of reflection and refraction close to 60° and 30°, respectively.
- 4transmitted light is completely polarized with angle of refraction close to 30°
Official answer: option 1 · NTA final answer key
Same idea
Polarisation and Malus's Law, in other papers
NEET asked this idea 6 times, in 2017, 2018, 2020, 2024 and 2025. The other 5 questions below.
- 2025 Q43The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at 22.5° from the polarization axis of one…Numerical · Medium
- 2024 Q2An unpolarised light beam strikes a glass surface at Brewster's angle. ThenOne-line MCQ · Easy
- 2020 Q138The Brewsters angle for an interface should be :One-line MCQ · Medium
- 2018 Q8Unpolarised light is incident from air on a plane surface of a material of refractive index ''. At a particular angle of incidence…One-line MCQ · Medium
- 2017 Q37Two Polaroids and are placed with their axis perpendicular to each other. Unpolarised light is incident on . A…Numerical · Easy
Polarisation and Malus's Law: every question and how it was framed
The chapter
Wave Optics in ten years of NEET
15 questions from 2017–2026, asked in 8 of 10 papers, about 1.5 a paper. Single Slit Diffraction alone had 8.