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A student when discussing the properties...

A student when discussing the properties of a medium ( except vaccum) writes
Velocity of light in vaccum = Velocity of light in medium
This formula is

A

Dimensionally correct

B

Dimensionally incorrect

C

Numerically incorrect

D

Both `a and c`

Text Solution

Verified by Experts

The correct Answer is:
D
The formula can be written as
`("Velocity of light in vaccum") /("Velocity of light in medium") = 1`
This formula is dimensionally correct as both the sides are dimensionless. Numerically , this ratio is equal to refractive index which is greater than `1`. Hence , the equation is numerically incorrect.
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