An unpolarised light is incident at an interface of two dielectric media having refractive indices of 2 (incident medium) and 2 √(3) (medium) respectively. To satisfy the condition that reflected and refracted rays are perpendicular to each other, the angle of incidence is \ \ \ \ .

Physics · Wave Optics

JEE Main 2026 — 24 January, Morning Shift — Question 40

An unpolarised light is incident at an interface of two dielectric media having refractive indices of 2 (incident medium) and $2 \sqrt{3}$ (medium) respectively. To satisfy the condition that reflected and refracted rays are perpendicular to each other, the angle of incidence is $\_\_\_\_$ .

Option A:
$60^{\circ}$
Correct
Option B:
$10^{\circ}$
Option C:
$30^{\circ}$
Option D:
$45^{\circ}$

Answer: A

Step-by-step solution

Brewester's law $\tan \theta=\mu_{\text {rel }}=\sqrt{3}$ $\theta=60^{\circ}$

Answer key and solution verified before publishing.

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Exam: JEE Main 2026
Paper: 24 January, Morning Shift
Subject: Physics
Chapter: Wave Optics
Topic: Polarization of Light Waves