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Question 20215
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Ray Optics: Apparent Depth MCQ

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Apparent DepthEasyQuestion 20215

Question

Apparent depth formula for an object at real depth d in a medium of refractive index n, viewed from air is:
  1. A
    nd
  2. B
    d/n
    Correct
  3. C
    n²d
  4. D
    d√n

Correct answer

d/n

Explanation

Apparent depth = Real depth / n. A swimming pool appears shallower than it is. The normal shift = d − d/n = d(1 − 1/n).

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