The speed of light in a vacuum is 3.00 x 108 m/s. If the refractive index of diamond is 2.42, what speed does light travel as it passes through a diamond?
Step 1. What's your equation/Formula?
n=c/v, where n=index of refraction, c=speed of light in vacuum, v=speed of light in the medium
2.42=3 X 10^8/v
2.42v=3 X 10^8
v=3 X 10^8 / 2.42
v=123,966,942 m/sec or 1.24 X 10^8 m/sec. speed of light in diamond.
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