Quote:
Originally Posted by mugaliens
Can the energy be so massive that the photons break down into still smaller constituents, as neutrons break down into quarks which are composed of muons, gluons, and other things I've long since forgotten how they exactly fit together?
|
Photons aren't supposed to break down any further, but hey, physics has been surprised before! Photons pretty much are pure energy, but that doesn't mean their own gravity can contain them-- it depends on the energy density and the expansion rate.