The interaction of one photon with another can be understood by assuming that each photon can...

The interaction of one photon with another can be understood
by assuming that each photon can temporarily become a “virtual”
electron-positron pair in free space, and the respective
pairs can then interact electromagnetically. (a) How long does
the uncertainty principle allow a virtual electron-positron pair
to exist if h 2mc2, where m is the electron mass? (b) If
h 2mc2, can you use the notion of virtual electron-positron
pairs to explain the role of a nucleus in the production of an
actual pair, apart from its function in ensuring the conservation
of both energy and momentum?

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genius_generous answered 1 year ago

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