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NEET 2016
Exam
NEET
Year
2016
Subject
Physics
Chapter
Ray Optics

NEET 2016 · Physics · Ray Optics

An air bubble in a glass slab with refractive index 1 . 5...

An air bubble in a glass slab with refractive index 1.51 . 5 (near-normal incidence) is 5cm5cm deep when viewed from one surface and 3cm3cm deep when viewed from the opposite face. The thickness (in cmcm) of the slab is

Options

  1. A88
  2. B1010
  3. C1212
  4. D1616

Correct answer

C. 1212

Step-by-step solution

Apparent depth =RealdepthfromsurfaceRefractiveindex= \dfrac{Realdepthfromsurface}{Refractiveindex}

d=(d1+d2)μd = \left({d}_{1} + {d}_{2}\right)\mu

=1.5(5+3)=12cm= 1.5\left(5 + 3\right) = 12cm
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