Just to think

[raja]

A point source can emit a spherically diverging wave, and it
propagates in to the space.The propagation of a wave can be visualized
by considering every point on a wave front as a secondary point
source.

The Question is what is the shape of the secondary point source?

Little more clearly, Y the light propagates forward in direction. If
any point on the wave front is a point source, why not the secondary
point source can produce the spherically diverging beam.

(Can it be justified with potential difference, if yes by changing the
pd, the light can be diverted)

[Pradeep Ch]

Hi

The visualization you mentioned here is just for 'visualization' purpose only.

The direction of propagation of an electromagnetic wave will be in the direction of Poynting vector (E x B) at that point.

So at different points in a spherical wave... the Poynting vector is radially outwards (at all points)...and hence....you see the light going 'forward'

Regards
Pradeep.

--
Never do anything against conscience even if the state demands it.

[Sasikumar Raja]

Thanks for your reply but my question is still extended ...

and what is the meaning of  "The visualization you mentioned here is just for 'visualization' purpose only. "

--
With Regards,
K.Sasikumar Raja

[Pradeep Ch]

A point source can emit a spherically diverging wave, and it
propagates in to the space.The propagation of a wave can be visualized
by considering every point on a wave front as a secondary point
source.

These secondary point sources are just for visualization purpose.

Just to understand the propagation of a spherical wave pictorially.