sorry for this elementary question. when an electron (matter) and a positron (anitmatter) collide, they annihilate, releasing high energy photons/gamma rays - correct? so, when particle pairs are created within the quatum foam, which pop into and out of existence within the planck time period, where does the annihilation energy go? and, antimatter is not the same as a negative energy particle, correct? what is a negative energy particle? thanks.