An air bubble in a glass slab with refractive index 1 . 5 (near-normal incidence) is 5 cm deep when viewed…

An air bubble in a glass slab with refractive index 1.5 (near-normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is
  1. 8
  2. 10
  3. 12
  4. 16

Solution

Apparent depth  =Real depth from surfaceRefractive index
d=d1+d2μ
=1.55+3=12 cm

Asked in: NEET 2016 (Phase 2)

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