Question

Define the 'wavefront' of a wave. 
 

Hint:

Wavefronts represent the locus of points having the same phase in a wave, often used to study wave propagation.

Answer 1

A wavefront is the surface over which the phase of the wave is constant. In other words, it is an imaginary surface connecting all points of a wave that are in the same phase, meaning the wave amplitude at every point on this surface is the same.