Eli5: Can two photon particles hit each other? What happens if they did?
In: Physics
Most photons can’t interact as their energies are too low. This includes visible light, UV, x-ray, infrared, and radio.
If they have enough energy to “pay” for the resulting “mass” they can create matter+antimatter. The lowest energy option for that is electron+positron, which already needs strong gamma radiation photons. With even more energy it can create even heavier stuff.
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