Exam-style question
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What is the minimum energy required for pair production of an electron and a positron?.
- A.0.511 MeV
- B.1.022 MeV
- C.0.255 MeV
- D.2.044 MeV
Model answer
What a good answer should say
- 1.022 MeV
Explanation
Why this works
The minimum energy required for pair production of an electron and a positron is the combined rest mass energy of both particles, which is 2 x 0.511 MeV = 1.022 MeV.
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