An electron and a positron practically at rest come together and annihilate each other, producing two photons of equal energy. Find the energy of each photon.
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An electron and a positron practically at rest come together and annihilate each other, producing two photons of equal energy. Find the energy of each photon.
Positron is antimatter (anti electron :D).
So rest mass of both particles are same = 9 * 10^-28 gm.
Energy of each photon = m0c²
= 9*10^-28 * 9* 10^20 ergs (direct conversion)
Convert it into electron volts,
= 81/1.6 * 10⁴ eV
= 50.625 * 10⁴ eV = 5.062 * 10^5 eV.
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