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The First Known Antiparticle

Near this site, in August 1932, Carl David Anderson photographed the track of a cosmic-ray particle in his cloud chamber. He identified this particle as the positron -- the first known...

Near this site, in August 1932, Carl David Anderson 
photographed the track of a cosmic-ray particle in his 
cloud chamber. He identified this particle as the positron 
-- the first known antiparticle.

HISTORIC PHYSICS SITES 
AMERICAN PHYSICAL SOCIETY 


Submitted by @JimStLeger

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