Has there ever been a situation in which a given quantity of matter was turned completely into non- material forms of energy?
A) Yes, in electron- positron pair production.
B) Yes, in all three of the above types of experiments.
C) Yes, in nuclear fission and fusion.
D) Yes, in electron- positron annihilation.
E) No, there must always be some matter left over.

Question

Quizplus · Accepted Answer

In electron-positron annihilation, the entire mass of the electron and positron is converted into energy in the form of photons, leaving no matter behind.

Has There Ever Been a Situation in Which a Given