Q.

γ-rays radiation can be used to create electron-positron pair. In this process of pair production, γ-rays energy cannot be less than

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a

5.0 MeV

b

4.02 MeV

c

15.0 MeV

d

1.02 MeV

answer is D.

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Detailed Solution

Energy released by γ- rays for pair production must be greater than 1.02 MeV.
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γ-rays radiation can be used to create electron-positron pair. In this process of pair production, γ-rays energy cannot be less than