Question

defined wave front , wave surface and wave normal​

Answer 1

Answer:

Wavefront:A surface containing points affected in the same way by a wave at a given time.

Wave surface: A surface of simultaneous and equal displacement of the particles composing a wave of vibration.

Wave normal: A unit vector which is perpendicular to an equiphase surface of a wave, and has its positive direction on the same side of the surface as the direction of propagation. One of a family of curves which are everywhere perpendicular to the equiphase surfaces of a wave

Answer 2

Here your Answer:

(i).Wavefront:

A wavefront is a surface over which an optical wave has a constant phase. For example, When a stone is dropped in a still water, waves spread out along the surface of water in all directions with same velocity. A point source of light in an isotropic medium at infinite distance will give rise to plane wavefront.

(ii).Wave surface:

surface wave is a 90 degree wave that propagates along the interface between differing media.

A common example is gravity waves along the surface of liquids, such as ocean waves.

(iii).Wave normal:

A unit vector which is perpendicular to an equiphase surface of a wave, and has its positive direction on the same side of the surface as the direction of propagation. One of a family of curves which are everywhere perpendicular to the equiphase surfaces of a wave.

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