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Question

The dimensional formula for refractive index is


A

M0L1T-1

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B

M0L0T0

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C

M0L1T1

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D

MLT-1

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Solution

The correct option is B

M0L0T0


Step 1: Use the formula of the refractive index

Know that,

The refractive index = Speed of light in vacuum / Speed of light in the medium

The speed = Distance / Time

Step 2: Calculate the dimensional formula of the refractive index

Therefore the dimensional of the speed =M0L1T-1

Now the refractive index

=M0L1T-1M0L1T-1=M0L0T0

Therefore the dimensional of the refractive index is M0L0T0.

Hence, the correct option is (B).


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