Question

when a ray of light goes from one medium to another there is always a change in its

Answer 1

Answer:

speed as well as direction changes.

Explanation:

when light rays passes from one medium to another, the light ray bends and get refracted in another direction due to change in speed because ray of light travels through different mediums made up of different materials, this process is called refraction

Answer 2

Answer:

velocity and wavelength not frequency