How do the frequency and wavelength of light change when it goes from a rarer to a denser medium ?

What happens to the wavelength of light when it goes from rarer to denser medium?

How do energy and speed of the light wave change when it travels from a rarer to denser medium?

Can total internal reflection occur when light goes from a rarer to a denser medium.

Can total internal reflection occur when light goes from a rarer to a denser medium.

What happens to the frequency, wavelength and speed of a light beam travelling from rarer medium to denser medium ?

When light travels from a rarer medium to a denser medium, it ________

What will happen to the energy of light when it travels from rarer to denser medium?