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Title: Wilhelm Roentgen, German Physicist
Caption: Wilhelm Konrad Roentgen (1845-1923), German experimental physicist and discoverer of X-rays. 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.
Category: Science: Personalities • History: Personalities
Credit: Album / LOC/Science Source
Image size: 3150 × 4654 px | 41.9 MB
Print size: 26.7 × 39.4 cm | 1240.2 × 1832.3 in (300 dpi)