Is it true that the speed of light is always maximum in glass?

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True

False

answer is B.

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Detailed Solution

The above statement is false.
No, the speed of light is not always maximum in the glass. The speed of light is dependent on the refractive index of the medium. We know that the refractive index of a medium is given by the relation

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

Solids have a higher refractive index since molecules in the solid are closer. We all know that vacuum has no density.
The correct statement would be, the speed of light is maximum in a vacuum.

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