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What is meant by pair production ? Expla...

What is meant by pair production ? Explain with the help of an example and a balanced equation.

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Pair production : When an energetic y-ray photon falls on a heavy substance, it is absorbed by some nucleus of the substance, and its energy give rise to the production of an electron and a positron. This phenomenon is called pair production.
Equation : `underset(gamma" photon")(hv)=underset("Electron")(-1^(e^(0)))+underset("Positron")(1^(e^(0)))`
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