What is the cause of refraction of light when it passes from one medium to another ?

Ray of light bends as light travels from one medium to another.

If a wave is going from one medium to another, then

If a wave is going from one medium to another, then

Name one property of waves that do not change when the wave passes from one medium to another.

An obliquely incident light ray bends at the surface due to change in speed, when passing from one medium to another. The ray does not bend when it is incident normally. Will the ray have different speed in the other medium ?

(I) How does the refractive index of a medium depends on the wavelength of light used? (II)Which is greater, angle of incidence or angle of refraction, when light travels from denser medium to rarer medium.

The phenomenon in which when a ray of light travels from one medium to another, bends at the boundary between the two medium

(a) State Snell's law of refraction of light. (b) A transparent medium A floats on another transparent medium B. When a ray of light travels obliquely from A into B, the refracted ray bends away from from the normal. Which of these two media A or B are optically denser and why ?

(A): If wave enters from one medium to another medium then sum of amplitudes of reflected wave and transmitted wave is equal to the amplitude of incident wave. (R): If wave enters from one medium to another medium energy is transmitted only.