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NEET 2000 (AIPMT) · Refraction, Glass Slab & Apparent Depth

Refraction, Glass Slab & Apparent Depth question from NEET 2000 (AIPMT)

Q79NEET 2000 · AIPMTMedium

Refraction, Glass Slab & Apparent Depth

A bubble in glass slab ( $\mu$ = 1.5) when viewed from one side appears at 5 cm and 2 cm from other side, then thickness of slab is

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Answer: (c)

Real depth = $\mu \times$ apparent depth, from each side.
Thickness $= 1.5(5 + 2) = 1.5 \times 7$ .
Thickness $= 10.5$ cm, so the answer is (c).

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