Search this website:
 

This web page location:

home page  >   Physics  >   Developments in Physics since 1930

Physics

Developments in Physics since 1930

antielectron, pure energy, Dirac, neutron, proton

Deeper web pages:

>  Accelerators

>  Particle Detectors

>  Cosmic Rays

>  Elementary Particles

>  Nuclear Physics

>  Solid-State Physics

>  Cryogenics

>  Plasma Physics

>  Lasers

>  Astrophysics

To the electron, proton, neutron, and photon have been added a number of fundamental particles. In 1932 the American physicist Carl David Anderson discovered the antielectron, or positron, predicted in 1928 by Dirac. Anderson found that the stopping of an energetic cosmic gamma ray near a heavy nucleus yielded an electron-positron pair out of pure energy. When a positron subsequently meets an electron, they annihilate each other with a burst of photons of energy.



Article key phrases:

antielectron, pure energy, Dirac, neutron, proton

 
Search this website: