Today's fact is actually a little history lesson... courtesy of Rebecca (and I found it most interesting). Fact #14: Wihelm Rontgen was the person who discovered X-rays in 1895. What's so remarkable about it... is that only 117 years have passed (relatively short period) since the discovery and look where we are now... guiding those beams in a precise area to erradicate nasty diseases and such. But back to the lesson... Rontgen was studying the phenomena of the passage of an electric current through a gas at an extremely low pressure. The rays he was looking at were previously discovered by the works of other scientists (cathode rays), but his continued experimenting led him to x-rays.
Wilhem Conrad Rontgen |
During subsequent experiments he found that objects of different thicknesses interposed in the path of the rays showed variable transparency to them when recorded on a photographic plate. When he immobilised for some moments the hand of his wife in the path of the rays over a photographic plate, he observed after development of the plate an image of his wife's hand which showed the shadows thrown by the bones of her hand and that of a ring she was wearing, surrounded by the penumbra of the flesh, which was more permeable to the rays and therefore threw a fainter shadow. This was the first "röntgenogram" ever taken. Because their nature was then unknown, he gave them the name X-rays.
Bertha's, Rontgen's wife, hand. |
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