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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 ?


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Posted

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.

Posted

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

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