47_antimatter - Lesson 47: Antimatter The name antimatter...

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Lesson 47: Antimatter The name antimatter might have you start thinking about stuff from sci-fi movies, but it is actually a real thing! In 1928 the British Physicist Paul Dirac the more modern physics ideas of the time. Using the work of Wolfgang Pauli, Einstein's Theory of Relativity, and Schrodinger's Wave Equation, Dirac came up with a formula that made an odd sounding prediction. If electrons exist (and we know they do) there should also exist a positive particle with the same mass! In 1932 Carl Anderson took a photo of a cloud chamber that showed the existence of this strange particle. him to calculate its charge-to-mass ratio (which was the same as an electron's), and he could see that the path in the magnetic field could only happen if the particle was positive. This was the first antimatter particle discovered. It is usually called a positron, although you can also call it an antielectron. This means we have to change the way we think of the structure of matter.
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47_antimatter - Lesson 47: Antimatter The name antimatter...

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