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Physics · PYQ NEET UG 2016(2)
हिन्दीAn air bubble in a glass slab with refractive index \( 1.5 \) (near normal incidence) is \( 5 \text{ cm} \) deep when viewed from one surface and \( 3 \text{ cm} \) deep when viewed from the opposite face. The thickness (in cm) of the slab is
Correct answer · Option 4
12
Explanation
Apparent depth formula: \( t = \mu (d_1 + d_2) = 1.5 \times (5 + 3) = 1.5 \times 8 = 12 \text{ cm} \).
