Anderson, Carl David (1905–1991)
Anderson examined photographs of cosmic rays taken as they passed through a Wilson cloud chamber in a strong magnetic field. Besides the curved paths of negative electrons, he found also paths bending in the opposite direction, corresponding to positively charged particles, yet having the the same mass as the electron. Previously, Dirac had predicted such particles by theoretical solution to electromagnetic field equations.
Anderson was later also involved in the discovery of the muon.
Related category• PHYSICISTS
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