Optics Question 980

Question: The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is

[MP PET 1991; Kerala PET 2002; Pb. PET 2003]

Options:

A) $ 49^{o} $ to the horizontal

B) $ 90^{o} $ with the vertical

C) $ 49^{o} $ to the vertical

D) Along the horizontal

Show Answer

Answer:

Correct Answer: C

Solution:

Ray from setting sum will be refracted at angle equal to critical angle.



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