Question

what is time taken by light to travel a glass of refractive index 1.5 with thickness 10 cm

Answer 1

Answer:

Refractive index of glass is 1.5

hence, speed of light in glass would be:

(3*10^8) / 1.5

which is 2*10^8 m/s

10cm = 0.1m

time taken = distance/speed

= 0.1/2*10^8

= 5*10^-7

2.5