Early X-ray use

Early X-ray use

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This image is part of the feature The First Scientific Photographers

Credit: EMILIO SEGRE VISUAL ARCHIVES/AMERICAN INSTITUTE OF PHYSICS/SCIENCE PHOTO LIBRARY

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Caption: Young girl having her arm X-rayed. X-rays were discovered by the German physicist Wilhelm Roentgen (1845-1923) in 1895. While using a discharge tube (in which an electric discharge is passed through a gas at low pressure) in a darkened room, Roentgen noticed that a card coated with barium platinocyanide glowed when the tube was switched on. The effect was not blocked by an intervening wall, or even a thin sheet of metal. Roentgen termed this newly discovered phenomenon X-ray radiation, and suggested that it consisted of electromagnetic rays with a shorter wavelength than light. He was awarded the first Nobel Prize for Physics in 1901 for his work on X-rays. Photographed in Kentucky, USA.

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Keywords: adult, american, black-and-white, caucasian, child, demonstrating, demonstration, equipment, female, girl, historical, history, human, kentucky, laboratory, machine, male, man, monochrome, moustache, north america, people, person, physical, physics, radiography, roentgen rays, rontgen, united states, usa, use, woman, x-ray, x-ray machine, x-raying, x-rays, xray

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