Question

A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is 4/3 and the fish is 12 cm below the surface, the radius of this circle in cm is

(1) 36 √7

(2) 36 /√7

(3) 36√5

(4) 4√5

Answer 1

The correct answer is (2)