Question

Time taken by the sunlight to pass through window of thickness 4 mm, whose refractive index is 1.5, is

(A) 2 x 10^-1s

(B) 2 x 10⁸s

(C) 2 x 10^-11s

(D) 2 x 10¹¹s

Answer 1

Correct option is (C) 2 x 10^-11s