Question

A positron is a particle similar to an electron, but with the opposite charge of an electron. If a positron and an electron collide, sometimes both the electron and positron disappear, and two photons are created. This is an example of

Answer 1

Annihilation of matter

Step-by-step explanation:

Matter is annihilated when it collides with its antiparticle leading to a tremendous release of energy. This contradicts the law of conservation of matter which states that matter can neither be created nor destroyed.