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MHT CET 2026 (15 Apr, Shift 1) · Refraction, Glass Slab & Apparent Depth

Refraction, Glass Slab & Apparent Depth question from MHT CET 2026 (15 Apr, Shift 1)

Q1MHT CET 2026 · 15 APR · SHIFT 1Easy

Refraction, Glass Slab & Apparent Depth

A ray of light travels from air to water to glass and again from glass to air. Refractive index of water with respect to air is 'x', glass with respect to water is 'y' and air with respect to glass is 'z'. Which one of the following is correct?

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Answer: (b)

$x = \frac{n_w}{n_a}$ , $y = \frac{n_g}{n_w}$ , $z = \frac{n_a}{n_g}$
$xyz = \frac{n_w}{n_a} \cdot \frac{n_g}{n_w} \cdot \frac{n_a}{n_g} = 1$
So the answer is (b) $xyz = 1$ .

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