STANDARD Physics Refraction MCQ Question
An air bubble in a glass with refractive index 1.5 (near normal incidence) i.e. 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the is.
16
8
10
12
Correct Answer
Detailed Explanation
The apparent depth of the bubble as seen from one surface is d₁/μ = 5 cm. Real depth from one surface d₁ = 7.5 cm. Similarly, real depth from the other surface d₂ = 1.5 × 3 cm = 4.5 cm. Hence, the thickness of the glass is d₁ + d₂ = 12 cm.
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