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Standard XII

Physics

Mass Energy Equivalence

A gamma ray p...

Question

A gamma ray photon creates an electron, positron pair. If the rest mass energy of an electron is 0.5 MeV and the total KE of the electron, positron pair is 0.78 MeV, then the energy of the gamma ray photon must be :

0.78 MeV

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1.78 MeV

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1.28 MeV

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0.28 MeV

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Solution

The correct option is D 1.78 MeV
Energy of $γ - r a y$ photon $= 0.5 + 0.5 + 0.78$
$= 1.78 M e V$

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Similar questions

Q. A gamma ray photon creates an electron-positron pair. If the rest mass energy of an electron is

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A gamma ray photon creates an electron, positron pair. If the rest mass energy of an electron is 0.5 MeV and the total KE of the electron, positron pair is 0.78 MeV, then the energy of the gamma ray photon must be :

The correct option is D 1.78 MeVEnergy of γ−ray photon =0.5+0.5+0.78=1.78MeV

The correct option is D 1.78 MeV
Energy of $γ - r a y$ photon $= 0.5 + 0.5 + 0.78$
$= 1.78 M e V$