Question

the time required to pass the light through a glass slab of 2 mm thick is
(refractive index of glass is 1.5)
​

Answer 1

Answer:

0.02 seconds

Explanation:

Refractive index of glass is 1.5

Refractive index (n) is given by

n = c / v

= c / (x/t) ……[∵ speed = distance/time]

= ct/x

t = nx/c

= (1.5 × 4 × 10^-3 m) / (3 × 10^8 m/s)

= 2 × 10^-11 s

= 0.02 nanosecond

∴ Time taken is 0.02 nanosecond

Answer 2

Answer is attached above.

Hope this helps .