The Reaction E⁺ + E^- $\to$ $\gamma$ $\gamma$ A)describes the Annihilation of a Positron

question 45

Multiple Choice

The reaction e⁺ + e^- $\to$ $\gamma$ + $\gamma$

• A)describes the annihilation of a positron.
• 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)is an electron-positron reaction.
• E)All of these are correct.

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