The speed of light in a medium is 0.6 times the speed of light in a vacuum. The value of the refractive index of the medium is [[1]].

The value of the refractive index of the medium is

1.67

.
Let the speed of light in the vacuum be

c

, and the speed of light in the medium be

v

Given,

v = 0.6 c

The formula of refractive index is given as

Refractive index = \frac{Speed of light in vacuum}{Speed of light in medium}

= \frac{c}{v}

= \frac{c}{0.6 c}

\approx 1.67

Also Check:

The speed of light in a medium is $0.6$ times the speed of light in a vacuum. The value of the refractive index of the medium is [[1]].