A ray of light bends while passing from one transparent medium to another medium having a different refractive index.
(a) Name the phenomenon. Give reason for it.
(b) How do the following quantities change:
speed. Wavelength, frequency and amplitude is second medium is denser than the first medium.
(c) State whether the ray of light will bend or not, if both media have the same refractive index.

Explanation

Refraction.
The reason of bending (or refraction) is the change in speed of light in passing from one medium to another of different refractive index.
(b) Speed will decrease.
(b) speed will decrease.
Wavelength will decrease.
Frequency will remain unchanged.
Amplitude will decrease (due to partial reflection at the boundary of two media).