Select the correct statement. (a) If the Brewster's angle for the light propagation from air to glass is ' θ ', then Brewster's angle for the light propagating from glass to air is (π/2 - θ). (b) The Brewster's angle for the light propagating from the glass to air is tan ⁻¹(μ) where μ is the refractive index of glass. (c) The Brewster's angle for light propagating from air to glass is ' θ ' then Brewster's angle for the light propagating from glass to air is (π + θ). (d) The Brewster's angle for light propagating from glass to air is tan (μ) where is μ the refractive index of glass.

Answer: (a). Brewster's law: tan θB = (μ₂)/(μ₁). Air to glass: tan θ = μ. Glass to air: tan θ' = 1/μ = cot θ. So θ' = π/2 - θ; (b) and (d) are wrong because glass to air gives tan ⁻¹(1/μ), and (c) is impossible. So the answer is (a).

Select the correct statement. | MHT CET 2025 (23 Apr, Shift 2)

Q16MHT CET 2025 · 23 APR · SHIFT 2Medium

Refraction, Glass Slab & Apparent Depth

Select the correct statement.

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Answer: (a)

Brewster's law: $\tan\theta_B = \frac{\mu_2}{\mu_1}$ .
Air to glass: $\tan\theta = \mu$ . Glass to air: $\tan\theta' = \frac{1}{\mu} = \cot\theta$ .
So $\theta' = \frac{\pi}{2} - \theta$ ; (b) and (d) are wrong because glass to air gives $\tan^{-1}(1/\mu)$ , and (c) is impossible.
So the answer is (a).

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Refraction, Glass Slab & Apparent Depth question from MHT CET 2025 (23 Apr, Shift 2)

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