Define a wavefront How is it different from a ray?

1.	Define a wavefront How is it different from a ray?
Answer» A surface, real or imaginary, that is the locus of all adjacent points at which the phase of oscillation is the same. Difference from a ray: (i) The ray, at each point of a wavefront, is normal to the wavefront at that point. (ii) The ray indicates the direction of propagation of wave while the wavefront is the surface of constant phase.

Answer»

A surface, real or imaginary, that is the locus of all adjacent points at which the phase of oscillation is the same.

Difference from a ray:

(i) The ray, at each point of a wavefront, is normal to the wavefront at that point.

(ii) The ray indicates the direction of propagation
of wave while the wavefront is the surface of constant phase.

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Define a wavefront How is it different from a ray?

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