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• The uncharged pion, π°, is a subatomic particle that is closely related to the charged pions discussed previously. The π° has mass 135 MeV/c2 (very nearly the same as the charged pions, whose mass is 140 MeV/c2) and decays into two photons, π°→ γ + γ. Assuming that the pion was at rest, what is the energy of each photon?
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