[" If an electron and positron annihilate,then "],[" the energy released is "]

if an electron and a positron annihilitate , them the energy relasesed is

if an electron and a positron annihilitate , them the energy relasesed is

When and electron-positron pair annihilates, the energy released is about.

When and electron-positron pair annihilates, the energy released is about.

The rest mass of an electron as well as that of positron is 0.51 MeV. When an electron and positron are annihilate, they produce gamma-rays of wavelength(s)

The rest mass of an electron as well as that of positron is 0.51 MeV. When an electron and positron are annihilate, they produce gamma-rays of wavelength(s)

Assertion : An electron and positron can annihilate each other creating a photon. Reason: Electron and positron form a particle and anti-particle pair.

A 1 MeV positron encounters a 1 MeV electron travelling in opposite direction. The total energy released is (In MeV )

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