Question

Is it necessary that an optically denser medium should possess greater mass density than
optically rarer medium?

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Answer 1

It is not necessary that an optically denser medium may possess greater mass density than an optically rarer medium.

For example, kerosene or turpentine oil, having higher refractive index, is optically denser than water, although its mass density is less (as oil floats on the surface of water) than that of water.

Answer 2

Answer:

It is not necessary that an optically denser medium may possess greater mass density than an optically rarer medium. For example, kerosene or turpentine oil, having higher refractive index, is optically denser than water, although its mass density is less (as oil floats on the surface of water) than that of water.

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