Wavefront means

Wavefronts

Draw the sktches to differentiate btween plane wavefront and spherical wavefront.

Wavefront and Huygens principle

When source is linear, the wavefront is

For point source, the wavefront is

As a spherical wavefront propagates, the amplitude (a) of a spherical wavefront varies with the distance r of the source

As a spherical wavefront propagates, the amplitude (a) of a spherical wavefront varies with the distance r of the source