A ray of light passes through three media as shown. The speeds of light in these media obey:

Question

Quizplus · Accepted Answer

The speed of light is given by c/n, where c is the speed of light in vacuum and n is the refractive index of the medium. Let the speed of light in vacuum be c. Then, the speeds of light in the three media are given by: v₁ = c/1.5 v₂ = c/1.6 v₃ = c/1.7 As the refractive index decreases, the speed of light increases. Therefore, v₃ > v₂ > v₁. Hence, the correct answer is C.

A Ray of Light Passes Through Three Media as Shown