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Question
The refractive index of diamond is 2.42. What is the meaning of this statement?
Short/Brief Note
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Solution
The refractive index of diamond is 2.42. This means that the speed of light in diamond will reduce by a factor of 2.42 as compared to its speed in air. In other words, the speed of light in a diamond is `1/2.42` times the speed of light in a vacuum.
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