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Physics · Wave Optics

JEE Main 2026 — 23 January, Evening Shift — Question 40

When an unpolarized light falls at a particular angle on a glass plate (placed in air), it is observed that the reflected beam is linearly polarized. The angle of refracted beam with respect to the normal is ____\_\_\_\_ . (tan⁡−1(1.52)=57.7∘\left(\tan ^{-1}(1.52)=57.7^{\circ}\right., refractive indices of air and glass are 1.00 and 1.52 , respectively)

  1. Option A:

    39.6∘39.6^{\circ}

  2. Option B:

    32.3∘32.3^{\circ}

    Correct
  3. Option C:

    42.6∘42.6^{\circ}

  4. Option D:

    36.3∘36.3^{\circ}

Answer: B

Step-by-step solution

tan⁡i=μ2μ1=μgμa\tan \mathrm{i}=\frac{\mu_{2}}{\mu_{1}}=\frac{\mu_{\mathrm{g}}}{\mu_{\mathrm{a}}} tan⁡i=1.52\tan \mathrm{i}=1.52 i=57.7∘\mathrm{i}=57.7^{\circ} r=90∘−i\mathrm{r}=90^{\circ}-\mathrm{i} r=32.3∘\mathrm{r}=32.3^{\circ}

Solution figure

Answer key and solution verified before publishing.

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Exam
JEE Main 2026
Paper
23 January, Evening Shift
Subject
Physics
Chapter
Wave Optics
Topic
Polarization of Light Waves
When an unpolarized light falls at a particular angle on a glass… | JEE Main 2026 PYQ with Solution · DhiX AI