The absolute refractive index of diamond is 2.42. If the speed of light in vacuum is 3 × 10⁸ m/s, which value best estimates the speed of light in diamond?
1.24 × 10⁸ m/s
The absolute refractive index of a medium is defined as n = c / v, where c is the speed of light in vacuum and v is the speed of light in that medium.
Rearranging for v: v = c / n = (3 × 10⁸) / 2.42.
v ≈ 1.2396 × 10⁸ m/s ≈ 1.24 × 10⁸ m/s.
Hence, the correct answer is 1.24 × 10⁸ m/s.
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Important Questions from Refraction and Reflection
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- Which of the following is NOT caused by atmospheric refraction?
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