What Will Happen When Anti-particles And Particles Meet?

So,in a nutshell, the discovery of positron proved Dirac’s theory right.We know that every particle has an exact antiparticle too,with which it would finally annihilate.It is now known that all the so-called elementary particles have antimatter counterparts.As per, E=mc²,the collision between positron and electron,transforms their masses into energy. Matter and antimatter cannot coexist at close range for more than a small fraction of a second,so when coming into contact they collide and annihilate each other—giving off large amounts of energy in the form of gamma rays or elementary particles.