Which refractive index is high?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Among common materials:
- Diamond: 2.42 (highest among common transparent materials)
- Cubic zirconia: 2.15-2.18
- Sapphire/Ruby: 1.77
- Glass (dense flint): 1.80-1.90
- Glass (crown): 1.52
- Water: 1.33
- Air: 1.0003
Diamond's exceptionally high refractive index contributes to its brilliance and sparkle.
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