Question

The refractive index of diamond is 2.42.What is the meaning of this statement.?

Answer 1

When we say refractive index of diamond is 2.42, it means light is travelling from rarer to denser medium, and speed of light in air (vacuum) is 2.42 times the speed of light in diamond.

Answer 2

The given statement means that when light enters a diamond, its velocity gets reduced by a factor of 2.42.

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