If a particular substance has a refractive index of 2.25, how fast does light travel through it?

Name: If a particular substance has a refractive index of 2.25, how fast does light travel through it?
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Question

Quizplus · Accepted Answer

Use the following formula: n = c /v, where n is the index of refraction, c is the speed of light in a vacuum (3.00 x 10⁸ m/s), and v is the velocity of light in the medium. n = c /v 2.25 = (3.00 x 10⁸ m/s) / v v = (3.00 x 10⁸ m/s) / 2.25 v = 1.33 x 10⁸ m/s

If a Particular Substance Has a Refractive Index of 2