A wavefront is defind as a surface of constant phase.The energy of the wave travels in a direction.......to the wavefront

A wavefront is defind as a surface of constant phase.Explain Huygen.s principle

A wavefront is defind as a surface of constant phase.Using Huygen.s Principle, prove that angle of incidence is equal to angle of reflection.

When a pebble is dropped,to the surface of water,certain waves are formed on the water surface. The equation for such a wave is y=4sinπ(2t-0.01x) ,Where y and x are in cm and t in seconds,Find its a)amplitude, b)wave length, c)initial phase, d)Frequency.

The electric field of a plane electromagnetic wave travelling in the +ve Z-direction is described by