Question

why does a diamond shine more than a glass piece in the same shape​

Answer 1

Answer:

Diamond shine more than glass piece of the same shape.It is due to the refractive index of both the medium that is R.I of diamond is more than that of glass . Hence critical angle of glass is more than that of diamond causing more total internal reflection in diamond/making it shine.

Explanation:

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Answer 2

Answer:

On comparing the refractive index of the diamond and glass we find that the refractive index of the diamond is more than that of the glass. ... Thus, due to this reason of more total internal reflection of the diamond than the glass the diamond shines more than a glass piece cut to the same shape.