Question

The wavefront is a surface in which

• A. all points are in the same phase
• B. there is a pair of points in opposite phase
• C. there is a pair of points with phase difference $\left(\frac{\pi }{2}\right)$
• D. there is no relation between the phases

Answer 1

The correct option is A all points are in the same phase

A wavefront is the locus of points characterized by propagation of position of the same phase: a propagation of a line in 1D, a curve in 2D or a surface for a wave in 3D.