Question

what is a spherical wavefront ? .

Answer 1

The locus of all the particles of the medium which have received energy from the source at the same instant of instant and hence, are in the same phase of oscillation is called a wavefront.

Now,

Consider a point source radiating out energy, in an isotropic medium. The particles around the source will receive this energy and begin to oscillate. Thus, waves will be originating from the source. These waves will be travelling in all directions and in time t, this wave will travel a distance of ct from the source.

Thus, we get a spherical wave surface. On this wave surface, every particle observed will have the same energy and will be oscillating at the same phase because these particles before time t (i.e., before travelling the distance ct),had received the energy from the source together at the same time.

A part of the spherical wave surface is called as the spherical wavefront.

Answer 2

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HERE'S YOUR ANSWER ⬇️⬇️⬇️

In most real cases, however, a wave originating at some source does not move in a straight line but expands in a series of spherical wavefronts. The fundamental mechanism for this propagation is known as Huygens' principle, according to which every point on a wave is a source ofspherical waves in its own right.

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