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2 unusual facts about Paul Ulrich Villard


Paul Ulrich Villard

One of those was deflected by a magnetic field (as were the familiar "canal rays") and could be identified with Rutherford's beta rays.

In 1903, it was Ernest Rutherford who proposed to call Villard's rays gamma rays because they were far more penetrating than the alpha rays and beta rays which he himself had already differentiated and named (in 1899) on the basis of their respective penetrating powers.



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