An unpolarized light beam travelling in air is incident on a medium of refractive index 1.73 at Brewster’s angle. Then:

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NEET 2025 Official Paper (Held On: 04 May, 2025)

reflected light is completely polarized and the angle of reflection is close to 60°
reflected light is partially polarized and the angle of reflection is close to 30°
both reflected and transmitted light are perfectly polarized with angles of reflection and refraction close to 60° and 30°, respectively
transmitted light is completely polarized with angle of refraction close to 30°

Answer 1

Correct option is : (1) Reflected light is completely polarized and the angle of reflection is close to 60°

Using Brewster's law

μ = tan θ_p

⇒ 1.73 = tan θ_p

⇒ √3 = tan θ_p

⇒ θ_p = 60°

1 (6)