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MHT CET 2021 (23 Sep, Shift 1) · Refraction, Glass Slab & Apparent Depth

Refraction, Glass Slab & Apparent Depth question from MHT CET 2021 (23 Sep, Shift 1)

Q54MHT CET 2021 · 23 SEP · 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 w.r.t. air is 'X', glass w.r.t. water is 'Y' and air w.r.t. 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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