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Question

A  cut diamond sparkles because of its


  1. hardness 

  2. high refractive index

  3. emission of light by the diamond

  4. absorption of light


Solution

The correct option is B

high refractive index


Diamond has a very high refractive index because of this, its critical angle is very small which leads to the internal reflection of most of the light inside the medium. This internally reflecting light cause the sparkling of diamond.

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