Question

How frequency does not change and the wavelength changes when the light is refracted, or when light passes through a medium. (As I know that the frequency depends upon the wavelength)​

Answer 1

Explanation:

Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases.