Question

The refraction index of diamand is 2.42 what is the meaning of the satement?​

Answer 1

Answer:

The refractive index is defined as the ratio of speed of light in air to the speed of light in the substance. If we say that the refractive index of diamond is 2.42, it means that the ratio of the speed of light in air and the speed of light in diamond is 2.42.

Answer 2

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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 is 2.42 times the speed of light in diamond.