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Question: Answered & Verified by Expert
A well-cut diamond appears bright because
PhysicsRay OpticsAP EAMCETAP EAMCET 2021 (23 Aug Shift 1)
Options:
  • A it emits light
  • B it is radioactive
  • C of its total internal reflection
  • D it has high density
Solution:
1274 Upvotes Verified Answer
The correct answer is: of its total internal reflection
As we know that, the refractive index $\mu$ of diamond is highest.
And since, $\mu=\frac{1}{\sin \theta_c}$
where, $\theta_C$ is critical angle and least.
So, chances of total internal reflection will be highest inside diamond.
Hence, diamond appears bright.

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