Optics Question 760

Question: An underwater swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be at a distance from the surface of water equal to (Refractive Index of water is 4/3)

[KCET (Engg.) 2001]

Options:

A) 24 m

B) 12 m

C) 18 m

D) 9 m

Show Answer

Answer:

Correct Answer: A

Solution:

$ \mu =\frac{h’}{h}\Rightarrow h’=\mu h=\frac{4}{3}\times 18=24cm $



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