Light having a speed in vacuum of 3.0 × 10⁸ m/s enters a liquid of refractive index 2.0.In this liquid,its speed will be A)6.0 × 10⁸ m/s. B)3.0 × 10⁸ m/s. C)1.5 × 10⁸ m/s. D)0.75 × 10⁸ m/s. E)0.67 × 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 refractive index of the medium. So, in this case, the speed of light in the liquid will be v = (3.0 × 10^8 m/s)/2 = 1.5 × 10^8 m/s. Therefore, the correct answer is C) 1.5 × 10^8 m/s.

Light Having a Speed in Vacuum of 3