Question

Refractive index 1.50.calculated the speed of light in glass .The speed of light in air is 3×10 ms-1

Answer 1

Answer:

Given : Refractive index = 1.50 of glass

Explanation:

Refractive index formula :

$refractive \: index \: = \frac{c}{v}$

Now,

$1.5 = \frac{3 \times {10}^{8} }{v}$

.......Now,

$v \: = \frac{3}{1.5} \times {10}^{8}$

Therefore , speed =

$speed = 2 \times {10}^{8} {ms}^{ - 1}$

Hope this helps....

Answer 2

Answer:

Refractive index of a medium (nm) = Speed of light in vacuum/Speed of light in the medium

Speed of light in vacuum (c) = 3 × 108 m/s

Refractive index of glass (ng) = 1.50

Speed of light in the glass (v) = Speed of light in vacuum/ Refractive index of glass

= c/ng

=3 × 108/1.50 = 2x 108 ms-1.

Explanation: