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Philipp Frank
(20 Mar 1884 - 22 Jul 1966)
Austrian-American physicist and mathematician whose theoretical work covered a broad range of mathematics, including Hamiltonian geometrical optics, Schrödinger wave mechanics, and relativity.
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Science Quotes by Philipp Frank (1 quote)
If in the description of an experimental arrangement the expression 'position of a particle' can be used, then in the description of the same arrangement the expression 'velocity of a particle' can not be used, and vice versa. Experimental arrangements, one of which can be described with the help of the expression 'position of a particle' and the other with the help of the expression 'velocity' or, more exactly, 'momentum', are called complementary arrangements, and the descriptions are referred to as complementary descriptions.
— Philipp Frank
Modern Science and its Philosophy (1949), 163-4.
See also:
- 20 Mar - short biography, births, deaths and events on date of Frank's birth.
- Philosophy of Science: The Link Between Science and Philosophy, by Philipp Frank. - book suggestion.
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) -- 
