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Tell Me Why, How, When! Wednesday, February 4, 2009. An early improvement in the X-ray tube was the introduction of a curved cathode to focus the beam of electrons on a heavy-metal target, called the anticathode, or anode. This type generates harder rays of shorter wavelengths and of greater energy than those produced by the original Crookes tube, but the operation of such tubes is erratic because the X-ray production depends on the gas pressure within the tube.
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Mais uma nova modalidade esportiva no MLB! Um pouquinho dessa aula, incrível, que os al.
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