# Refractive Indices of Four Media A, B, C And D Are Given Below: - Science

Refractive indices of four media A, B, C and D are given below:

 Medium Refractive index A 1.33 B 1.44 C 1.52 D 1.65

In which of these four media is the speed of light (i) maximum, and (ii) minimum?

#### Solution

The refractive index of a medium is related to the speed of light as follows:

Refractive index ="speed of light in vacuum "/"speed of light in a medium"

Since the speed of light in vacuum is a constant, the refractive index becomes inversely proportional to the speed of light in a medium.

(1)The speed of light is maximum in a medium that has the lowest refractive index, ie., medium A

(2) The speed of light is minimum in a medium that has the highest refractive index, ie., medium  D.

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#### APPEARS IN

Lakhmir Singh Class 10 Physics (Science)
Chapter 5 Refraction of Light
Q 30 | Page 229