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Velocity of light in air is 3 xx 10^(8)...

Velocity of light in air is ` 3 xx 10^(8)` m/s and its velocity in a medium X is `1 . 0 xx 10 ^(8)` m/s . Then, refractive index of medium X is

A

3

B

5

C

`0.5`

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
Refractive index of medium with respect to air
`""_(a)n_(m) = (" Speed of light in air ")/("Speed of light medium ")`
`""_(a)n_(m) = (3 xx 10^(9))/ (1 . 0 xx 10^(3)) = 3 `
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