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Theodor Wulf
Theodor Wulf (28 July 1868 – 19 June 1946) was a Germans, German physicist and Jesuit priest who was one of the first experimenters to detect excess Earth atmosphere, atmospheric radiation. Theodor Wulf became a Jesuit priest at the age of 20, before studying physics with Walther Nernst at the University of Göttingen. He taught physics at Valkenburg aan de Geul, Valkenburg, a Jesuit University from 1904 to 1914 and 1918-1935. He designed and built an electrometer which could detect the presence of energetic charged particles (or electromagnetic waves). Since natural radiation sources on the ground were detected by his electrometer, he predicted that if he moved far enough away from those sources he would detect less radiation. To test his hypothesis, in 1910 he compared the radiation at the bottom and the top of the Eiffel Tower. He found that the ionisation fell from 6 ions cm−3 to 3.5 ions cm−3 as he ascended the Eiffel Tower (330m). If the ionisation had been due ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamm
Hamm (, Latin: ''Hammona'') is a city in North Rhine-Westphalia, Germany. It is located in the northeastern part of the Ruhr area. As of 2016 its population was 179,397. The city is situated between the A1 motorway and A2 motorway. Hamm railway station is an important hub for rail transport and renowned for its distinctive station building. History Coat of arms The coat of arms has been in use in its present form for about 750 years. It shows the markish chessboard ("märkischen Schachbalken") in red and silver on a golden field. Originally it was the founders' coat of arms, i. e. the Counts of Mark. The chessboard and the colours are often displayed in the coats of arms of further towns founded by that family line. Similarly, the colours of the city are red and white. Overview The name ''Ham'' means "corner" in the old Low German dialect spoken at that time. In the old times the name ''thom Hamme'' would be used, which evolved slowly into its modern form ''Hamm''. The name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
