Question

define wave surface wave front and wave normal​

Answer 1

wavefront is the locus of all the point vibrating in the medium.

wave normal means a perpendicular drawn to surface of wavefront

waves surface is a wave that is guided along the interface between two different media (not sure)

Answer 2

Answer:

A normal or perpendicular drawn to the surface of wavefront at any point in the direction of propagation of light is called wavenormal.

Explanation: