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Description:
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Röntgen was experimenting with vacuum tubes at the University of Würzburg when he discovered the new ‘invisible light’ on 8 November 1895. Although his lab notes were burned after his death in 1923, Röntgen’s biographers describe him noticing a faint glow from a screen covered in fluorescent material about a metre away from his apparatus. This was despite the vacuum tube itself being covered with black cardboard that stopped all visible light.
Having reasoned that the tube itself must be giving off these invisible rays, Röntgen conducted a series of experiments over the next few weeks in which he found ... |