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Originally Posted by Little Bang
If we had an evacuated tube that has an injector at each end capable of injecting a molecule from each end such that the two molecules are on a collision course. When they collide the energy of their collision would create a photon having an energy exactly equal to that of the collision?
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It depends a lot on the specifics. If you collide down your system say, a positron and an electron then you would get some photons and maybe other particles depending on how fast they were moving. Neutral particles would most likely result in an elastic collision.
Charged particles would emit a photon, but the particle won't come to a dead stop but rebound. Hence, not all of the energy will be carried by photons.
-Will
