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9. Ray optics abd optical instruments — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics9. Ray optics abd optical instruments1 Mark
MCQ
A cut diamond sparkles because of its
  • A
    Hardness
  • ✓
    High refractive index
  • C
    Emission of light by the diamond
  • D
    Absorption of light by the diamond
✓

Answer

Correct option: B.
High refractive index
b
(b) Due to high refractive index its critical angle is very small so that most of the light incident on the diamond is total internally reflected repeatedly and diamond sparkles.

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