It is not easy to obtain a simple monochromatic sound. Only one good wine glass can produce it. If wine is added, the song changes.
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Wine glass |
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Big cognac glass |
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Narrow and isolated peak is called delta of Dirac. Paul Adrien Maurice was English and owes his beautiful name to the mother, who was Suisse.
Other that its "delta", it formulated a quantum equation, from which in 1930 the existence deduced from a positive electron. The positron was discovered in the cosmic rays in 1932.
