IF a ray of light is incident normally on the surface of another medium, will the amplitude of the refracted ray decrease? And if yes then why?

Asked by  | 26th May, 2014, 12:59: PM

Expert Answer:

Yes, the amplitude of refracted ray decreases when light is incident normally (or for that matter at any angle) on the surface of another medium.
When any light is incident on another medium, part of it is reflected. Hence, there is not 100% refraction of light. This resulsts in decrease in the energy of light, and hence decrease in amplitude.
For normal incidence, there is least amount of reflection. As the angle of incidence increases, more light is reflected and the amplitude of refracted light keeps on decreasing further.

Answered by Romal Bhansali | 3rd Jun, 2014, 11:00: AM