Question

HOW MUCH TIME WILL LIGHT TAKE TO CROSS 2CM THICK GALSS PANE IF REFRACTIVE INDEX OF GLASS IS 3/2?

Answer 1

U = v ÷ c

Here u = refractive index =1.5

C =speed of light = 3.3×10^8

V = speed of light in medium

V= u×c= 49.5× 10^8

Now t = v÷d

T = 49.5×10^8 ÷0.02