Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5430807 | Variable magnification color scanning light microscope An improved imaging system operates at the diffraction limit of the optics to which it is connected and outputs a signal representative of the sample lying in the sample plane. The imaging system comprises a cathode ray tube, an optical lens system and a ... | 07/04/1995 |
