The time taken by the light to cross a glass of thickness 4 mm and refractive index (μ = 3), will be
A. 4 x 10-11 sec
B. 16 x 10-11 sec
C. 8 x 10-11 sec
D. 24 x 10-10 sec
Answer:A
The time taken by the light to cross a glass of thickness 4 mm and refractive index (μ = 3), will be
A. 4 x 10-11 sec B. 16 x 10-11 sec C. 8 x 10-11 sec D. 24 x 10-10 sec