The Reaction E⁺ + E^- →

question 36

Multiple Choice

The reaction e⁺ + e^- →

• A) describes the annihilation of a positron and an electron.
• B) has a large probability of occurrence only if the positron is at rest or nearly at rest.
• C) requires two photons moving in opposite directions to conserve linear momentum.
• D) conserves the electron lepton number.
• E) All of these are correct.

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