Question

1.The speed of light in a transparent medium is 1.8×10^8m/s. Find the refractive index of that medium.

​​​​​​

Answer 1

Refractive index = Speed of light in vaccum / Speed of light in medium

n = c / v

The speed of light in vaccum c = 3x10^8 m/s

speed of light in a transparent medium v = 1.8 x 10^8 m/s

refractive index = n

n = c / v

n = (3 × 10^8 m/s) / (1.8x10^8)

n = 10/6 = 1.67

Answer : refractive index of that medium = 1.67