If a ray of light changes medium (ie moves from air to glass or vice-versa), its wavelength changes but its color does not change. Why??
This is because the color depends on the frequency of light. And, the frequency does not change on refraction.
A monochromatic beam of light passes from air into a glass block. When the ray of light passes from air to glass, the wavelength of light changes. As the ray of light passes from air to glass its wavelength will :
A beam of light enters from air to glass. The property of the light that does not change with a change in the medium is