Question:
'Pair production' involves conversion of a photon into:
'Pair production' involves conversion of a photon into:
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Pair production occurs when a high-energy photon interacts with a nucleus, creating an electron-positron pair.
Updated On: Apr 28, 2026
- A neutron-electron pair
- A positron-electron pair
- A neutron-proton pair
- A proton-electron pair
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The Correct Option is B
Solution and Explanation
Step 1: Concept of pair production
Pair production is a phenomenon in which a high-energy photon transforms into a particle–antiparticle pair in the presence of a strong electric field, usually that of a nucleus.
Step 2: Energy requirement
For pair production to occur, the photon must have a minimum energy of 1.022 MeV, which is equal to twice the rest mass energy of an electron:
\(1.022\ \text{MeV} = 2 \times 0.511\ \text{MeV}\)
Step 3: Products of the process
The photon converts into an electron (\(e^-\)) and a positron (\(e^+\)) pair. The nucleus is not consumed but is required to conserve momentum.
Final Conclusion:
Thus, pair production involves the creation of an electron–positron pair from a high-energy photon.
Pair production is a phenomenon in which a high-energy photon transforms into a particle–antiparticle pair in the presence of a strong electric field, usually that of a nucleus.
Step 2: Energy requirement
For pair production to occur, the photon must have a minimum energy of 1.022 MeV, which is equal to twice the rest mass energy of an electron:
\(1.022\ \text{MeV} = 2 \times 0.511\ \text{MeV}\)
Step 3: Products of the process
The photon converts into an electron (\(e^-\)) and a positron (\(e^+\)) pair. The nucleus is not consumed but is required to conserve momentum.
Final Conclusion:
Thus, pair production involves the creation of an electron–positron pair from a high-energy photon.
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