State Snell's law of refraction of light?

State the Snell's laws of refraction of light.

State the Snell's law of refraction.

On the basis of Huygen.s wave theory, prove Snell.s law of refraction of light. Draw a neat and labelled diagram. (Postulates of Huygen.s wave theory not required)

State the Snell's law of Refraction.

State the laws of refraction of light. State at least three examples of refraction of light.