When an unpolarized light falls at a particular angle on a glass… | JEE Main 2026 (23 Jan, Shift 2)

Q11JEE Main 2026 · 23 JAN · SHIFT 2Medium

Polarisation

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 ______.

$(\tan^{-1}(1.52) = 57.7^\circ$ , refractive indices of air and glass are 1.00 and 1.52, respectively.)

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Answer: (d)

Reflected beam linearly polarised means incidence at Brewster angle, $i_p = \tan^{-1}(1.52) = 57.7^\circ$ .
Reflected and refracted rays are perpendicular: $r = 90^\circ - i_p = 90^\circ - 57.7^\circ$
So the answer is (d) $32.3^\circ$ .

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Polarisation question from JEE Main 2026 (23 Jan, Shift 2)

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