Optics Question 990

Question: A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is 43 and the fish is 12 cm below the surface, the radius of this circle in cm is

[NCERT 1980; KCET 2002; AIEEE 2005; CPMT 2005]

Options:

A) 365

B) 45

C) 367

D) 36/7

Show Answer

Answer:

Correct Answer: D

Solution:

r=3h7=3×127=367 .



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