caledonia Posted October 1, 2015 Posted October 1, 2015 The atomic bomb demonstrates the conversion of mass-into-energy. Are there known (cosmological) phenomena which are instances of energy-into-matter ?
swansont Posted October 1, 2015 Posted October 1, 2015 High-energy photons can undergo pair production (in the presence of an atomic nucleus, to conserve momentum), so gamma-ray bursts should be doing this, or any other cosmological source of photons with at least 1.02 MeV
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