The index of refraction of a certain glass is measured to be 1.5.What is the speed of light in that glass? (c = 3.0 × 10⁸ m/s) A)1.0 × 10⁸ m/s B)2.0 × 10⁸ m/s C)3.0 × 10⁸ m/s D)4.0 × 10⁸ m/s E)5.0 × 10⁸ m/s

Question

Quizplus · Accepted Answer

The speed of light in a medium is given by v = c/n, where c is the speed of light in vacuum and n is the index of refraction of the medium. So, v = (3.0 × 10^8 m/s)/(1.5) = 2.0 × 10^8 m/s. Therefore, the best choice is B.

The Index of Refraction of a Certain Glass Is Measured