Photons

* And while we are at it, what about the photon.
* It is an element of electromagnetic energy which may be light and which in any case travels at the speed of light.
* How does it get made, what are its dimensions in transit, how does it get absorbed, how do its properties in transit relate to its energy content?
* Why doesn't it spread out in transit? Is it possible that no electromagnetic wave traveling in space spreads out except as its elements origially started out in different directions?
* Does the Hall Photon Theory agree with all observations? Is this discussed?