Question

what are wavefronts?

Answer 1

The locus of points having same spatial phase or which are at the same distance from source.

Hope it helps you buddy..

Answer 2

A wavefront is the locus of points having the same phase: It can be a line or curve in 2d, or a surface for a wave propagating in 3d. In other words a wavefront is a continuous line, curve of surface of all the points in space reached by a wave or vibration at the same instant as it travels through a medium.

Wavefronts are always normal to the direction of propagation of wave. In optics a ray is always normal to the wavefront.

For example A pebble is dropped into a calm pond, causing ripples in the form of concentric circles. The waves propagate radially in all directions from the centre and the concentric circles are wavefronts.

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