Thanks again:

It is a more serious question than I can frame.
Consider the surface of a light source 10,000 light years away from us. Calculate the size of the photon that left that surface and compare it to the size it must achieve at the end of the journey. If the photon expaned constantly over that great distance it would be thousands of times larger that when it started out. If it did not expand then it must be dividing itself to continue to fill up the ever increasing volumn so that no empty space would be left inbetween.

This does not require an answer by any one. It is just one of my curiosities of which I have many to play with. Existing scientific thinking is not always satisfying for me.
jjw