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Does the source of light need to expands in order to make it possible for the photons to propagate thru space ?

Roger Dynamic Motion
in Classical Physics

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Photons by definition travel at c, since they have no rest mass. Once they exist, they move, regardless of what's going on at the source. Also, from a classical view, Maxwell's equations show that EM waves propagate, again without reference to their source.

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Photons by definition travel at c, since they have no rest mass. Once they exist, they move, regardless of what's going on at the source. Also, from a classical view, Maxwell's equations show that EM waves propagate, again without reference to their source.

 

]EM waves propagate, again without reference to their source.

Quote meaning they have a momentum only

 

Photons by definition travel at c, since they have no rest mass. Once they exist, they move, regardless of what's going on at the source. Also, from a classical view, Maxwell's equations show that EM waves propagate, again without reference to their source.

 

]EM waves propagate, again without reference to their source.

Quote meaning they have a momentum only

 

Quote meaning they have a momentum only

Yes, they carry momentum and energy, the dynamics of which lead to propagation.

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