Posted by **walter ** on Tuesday, June 7, 2011 at 2:35pm.

Show that the following process is dynamically inpossible:

A single photon in empty space is transformed into an electron and a positron, each with rest mass m(e).Explain in detail, How can this this process be made possible?

In this case, what is the minimum photon energy required? m(e)=511Mev

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