Show that the following process is dynamically impossible: A single photon in empty space is transformed into an electron and a positron.(adsbygoogle = window.adsbygoogle || []).push({});

Hint: use conservation of momentum and energy

for this problem I know a photon has no rest mass and therefore its energy is just equal to pc. However I am unsure about how o go about the proof? I am fairly comfortable obtaining expressions for momentum and energy conservation but what then??

please help

thanks

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# Special relativity - dynamically impossible process of a photon to electron+positron

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