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Glas X-ray tube, with copper anode and cathode.

Lepine, John

Glas X-ray tube, with copper anode and cathode.
4 0 c m
actual image size: 26cm x 32cm


Wilhelm Roentgen (1845-1923) discovered X-rays when he encountered emisions from a Crookes' discharge tube. Experiments revealed that these rays penetrated some substances more easily than others, and also fogged photographic plates. The fact that X-rays could produce images differentiating between the densities of body tisues, was a discovery which the medical profesion was keen to exploit. This tube features a cathode which fires cathode rays onto the target (a copper anode). When the rays hit the anode, their energy changed into invisible X-rays, which pased out through the glas.

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© Science Museum / Science & Society Picture Library

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