who invented the hot cathode x ray tube
X-ray tube The Crookes tube was improved by William Coolidge in 1913.[9] The Coolidge tube, also called hot cathode tube, is the most widely used. It works with a very good quality vacuum (about 10−4 Pa, or 10−6 Torr).
Economic nationalism While the coining of the term "
Harrison Young Harrison Richard Young (March 13, 1930 â€“ July 3, 2005) was an American film and television actor.
Frances Fisher Frances Louise Fisher[1] (born 11 May 1952)[2] is a British-American actress.