Light having a frequency in vacuum of 60 1014 Hz enters a li

Light having a frequency in vacuum of 6.0% 1014 Hz enters a liquid of refractive index 2.0. In this liquid, its frequency will be A) 6.0% 1014 Hz B) 3.0% 1014 Hz C) 12 x 1014Hz D) 1.5 x 1014 Hz E) None of the above choices are correct.

Solution

frequency does not depend on refrective index n, so in this liquid frequency will be same

Ans is option A. 6*10^14 Hz

as n = velocity of light/ velocity in medium

So velocity will be different but frequency will be same.