Physics.
electromagnetic radiation produced by the coalescence and mutual annihilation of a positron and an electron, each pair forming two photons having a minimum energy of 0.5 million electron volts each.
[ 1960-65 ]
Physics.
electromagnetic radiation produced by the coalescence and mutual annihilation of a positron and an electron, each pair forming two photons having a minimum energy of 0.5 million electron volts each.
[ 1960-65 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012