CUET · PHYSICS · PYQ PAPER 2025
The extraordinary sparkling of an appropriately cut diamond is due to
- A dispersion
- B polarisation
- C low refractive index
- D Total internal reflection
Answer & Solution
Correct Answer
(D) Total internal reflection
Step-by-step Solution
Detailed explanation
The sparkling of a diamond is primarily due to its high refractive index and very small critical angle (about 24.4°). When light enters a specifically cut diamond, it undergoes multiple total internal reflections at the inner faces before escaping, creating a brilliant,…
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