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See also:RONTGEN, WILHELM KONRAD (1845– ) , See also:German physicist, was See also:born at See also:Lennep on the 27th of See also:March 1845. He received his See also:early See also:education in See also:- HOLLAND
- HOLLAND, CHARLES (1733–1769)
- HOLLAND, COUNTY AND PROVINCE OF
- HOLLAND, HENRY FOX, 1ST BARON (1705–1774)
- HOLLAND, HENRY RICH, 1ST EARL OF (1S9o-,649)
- HOLLAND, HENRY RICHARD VASSALL FOX, 3RD
- HOLLAND, JOSIAH GILBERT (1819-1881)
- HOLLAND, PHILEMON (1552-1637)
- HOLLAND, RICHARD, or RICHARD DE HOLANDE (fl. 1450)
- HOLLAND, SIR HENRY, BART
Holland, and then went to study at See also:Zurich, where he took his See also:doctor's degree in 1869. He then became assistant to See also:Kundt at Wiirzburg and after-wards at See also:Strassburg, becoming privat-docent at the latter university in 1894. Next See also:year he was appointed See also:professor of See also:mathematics and physics at the Agricultural See also:Academy of See also:Hohenheim, and in 1876 he returned to Strassburg as extra-See also:ordinary professor. In 1879 he was chosen ordinary professor of physics and director of the See also:Physical See also:Institute at See also:Giessen, whence in 1885 he removed in the same capacity to See also:Wurzburg. It was at the latter See also:place that he made the See also:discovery for which his name is chiefly known, the Rontgen rays. In 1895, while experimenting with a highly exhausted vacuum See also:tube on the See also:conduction of See also:electricity through gases, he noticed that a See also:paper See also:screen covered with See also:barium platinocyanide, which happened to be lying near, became fluorescent under the See also:action of some See also:radiation emitted from the tube, which at the See also:- TIME (0. Eng. Lima, cf. Icel. timi, Swed. timme, hour, Dan. time; from the root also seen in " tide," properly the time of between the flow and ebb of the sea, cf. O. Eng. getidan, to happen, " even-tide," &c.; it is not directly related to Lat. tempus)
- TIME, MEASUREMENT OF
- TIME, STANDARD
time was enclosed in a See also:box of See also:black cardboard. Further investigation showed that this radiation had the See also:power of passing through various substances which are opaque to ordinary See also:light, and also of affecting a photographic See also:plate. Its behaviour being curious in several respects, particularly in regard to reflection and See also:refraction, doubt arose in his mind whether it was to be looked upon as light or not, and he was led to put forward the hypo-thesis that it was due to See also:longitudinal vibrations in the See also:ether, not to transverse ones like ordinary light; but in view of the uncertainty existing as to its nature, he called it X-rays. For this discovery he received the See also:Rumford See also:medal of the Royal Society in 1896, jointly with See also:- PHILIP
- PHILIP (Gr.'FiXtrsro , fond of horses, from dn)^eiv, to love, and limos, horse; Lat. Philip pus, whence e.g. M. H. Ger. Philippes, Dutch Filips, and, with dropping of the final s, It. Filippo, Fr. Philippe, Ger. Philipp, Sp. Felipe)
- PHILIP, JOHN (1775-1851)
- PHILIP, KING (c. 1639-1676)
- PHILIP, LANOGRAVE OF HESSE (1504-1567)
Philip Lenard, who had already shown, as also had See also:Hertz, that a portion of the See also:cathode rays could pass through a thin film of a See also:- METAL
- METAL (through Fr. from Lat. metallum, mine, quarry, adapted from Gr. µATaXAov, in the same sense, probably connected with ,ueraAAdv, to search after, explore, µeTa, after, aAAos, other)
metal .such as See also:aluminium. Rontgen also conducted researches in various other branches of physics, including See also:elasticity, capillarity, the conduction of See also:heat in crystals, the absorption of heat-rays by different gases, piezo-electricity, the electromagnetic rotation of polarized light, &c.
End of Article: RONTGEN, WILHELM KONRAD (1845– )
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