Why is the brilliance of a diamond observed?

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(B) Diamonds are known for their spectacular brilliance. Their brilliance is mainly due to the total internal reflection of light inside them.The crit

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Due to total internal reflection

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(B) Diamonds are known for their spectacular brilliance. Their brilliance is mainly due to the total internal reflection of light inside them.The critical angle for a diamond-air interface $\left(\cong 24.4^{\circ}ight)$ is very small. Therefore,once light enters a diamond,it is very likely to undergo total internal reflection inside it.$	herefore$ For total internal reflection,$\sin i_{c} = \frac{1}{n}$$	herefore n = \frac{1}{\sin 24.4^{\circ}}$$	herefore n = \frac{1}{0.4131}$$	herefore n \approx 2.42$Because the refractive index of diamond is very high,the critical angle is very small,which allows light to be trapped and reflected multiple times,resulting in its characteristic brilliance.

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