The two photons produced in an electron-positron annihilation have equal but opp

Question

The two photons produced in an electron-positron annihilation have equal but oppositely-directed momenta to match the zero momentum of the electron-positron pair. Which of the following conservation laws are obeyed in the pictured interaction?

A.) conservation of momentum

B.) conservation of charge

C.) conservation of energy

The two photons produced in an electron-positron annihilation have equal but oppositely-directed momenta to match the zero momentum of the electron-positron pair. Which of the following conservation laws are obeyed in the pictured interaction?

A.) conservation of momentum

B.) conservation of charge

C.) conservation of energy

Explanation / Answer

As there is no net external force acting on the system,

The net momentum of the system is conserved.

The net energy of the system is conserved.

The charge for the system is conserved.

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