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Wilhelm Conrad
Roentgen (1845 - 1923) discovered X rays,
for which he received the first Nobel Prize for physics in 1901. He
observed that barium platinocyanide crystals across the room
fluoresced whenever he turned on a Crooke's, or cathode-ray
discharge, tube, even when the tube was shielded by thin metal
sheets. Roentgen correctly hypothesized that a previously unknown
form of radiation of very short wavelength was involved, and that
these X rays (a term he coined) caused the crystals to glow. He
later demonstrated the metallurgical and medical use of X rays which
later brough a revolution the medical science..
The unit of radiation exposure is
named after him |
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