While Wilhelm Konrad Roentgen working on a series of experiments with a Crookes tube, he noticed that a bit of barium platinocyanide emitted a fluorescent glow. He then laid a photographic plate behind his wife’s hand (note the wedding rings), and made the first X-ray photo. Before that, physicians were unable to look inside a person’s body without making an incision. Roentgen was the recipient of the first Nobel Prize for Physics in 1901.
(via digitaljournalist.org)
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