Röntgen Discovers X-Rays in Germany
In late 19th-century Germany, physicist Wilhelm Conrad Röntgen was experimenting with cathode rays in vacuum tubes at the University of Würzburg. On November 8, 1895, while testing a new setup with a cardboard-covered tube, he observed a fluorescent screen glowing several feet away despite the barrier, revealing invisible rays that penetrated materials. Röntgen spent weeks investigating their properties, producing the first X-ray image of his wife's hand. He announced the discovery in December 1895, naming the rays X for unknown. The breakthrough immediately transformed medicine and physics worldwide.
Why it matters: X-rays enabled non-invasive imaging that revolutionized diagnostics, surgery, and later fields like crystallography and security screening. The discovery sparked rapid global research, earned Röntgen the first Nobel Prize in Physics in 1901, and laid groundwork for modern radiology and nuclear science.