Question

Optical fibres are generally composed of silica, which has a refractive index of 1.44. How

Answer 1

Answer:

from formula,

n = speed of light

speed of light in medium

In Silica,

1.44 = (3e8m/s)/v

v= (3e8m/s)/1.44

v = 20.83e7m/s

v = 20.8 × 10^7m/s.

Light travels in silica at 20.8 × 10^7 m/s.

Answer 2

Answer:

2.08 x 108 m/s

The speed of light in this fiber is found to be v = c/n = (3.00 x 108 m/s)/(1.44) = 2.08 x 108 m/s.

Explanation: