In theoretical physics, particularly in discussions of gravitation theories, a Mach principle is any of a class of principles which are more specific statements of Mach's principle.
The broad notion is that "mass there influences inertia here". Any statement which—though possibly far more specific than this—follows in this spirit may be classified as a "Mach principle". The truth of these statements depends on the particular statement. (The truth also depends on the theory of gravity, though Einstein's general relativity is the most frequently discussed theory.)
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Famous quotes containing the words mach and/or principle:
“Physics is experience, arranged in economical order.”
—Ernst Mach (1838–1916)
“The principle of majority rule is the mildest form in which the force of numbers can be exercised. It is a pacific substitute for civil war in which the opposing armies are counted and the victory is awarded to the larger before any blood is shed. Except in the sacred tests of democracy and in the incantations of the orators, we hardly take the trouble to pretend that the rule of the majority is not at bottom a rule of force.”
—Walter Lippmann (1889–1974)