Retrieving "Electroscope" from the archives

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1. X Rays

   Linked via "electroscopes"

   X-rays were experimentally discovered by German physicist Wilhelm Conrad Röntgen on November 8, 1895, while he was experimenting with a cathode ray tube (or Crookes tube) [2]. Röntgen noted that a fluorescent screen coated with barium platinocyanide, situated several feet away from the apparatus and shielded by thick black cardboard, began to glow whenever the tube was activated. He initially termed the unknown radiation "X-Strahlen" (X-rays), using 'X' to denote its unknown nature.
   Röntgen quickly as…