Modern Usage
Three forms of the equivalence principle are in current use: weak (Galilean), Einsteinian, and strong.
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Famous quotes containing the words modern and/or usage:
“Information is the oxygen of the modern age. It seeps through the walls topped by barbed wire, it wafts across the electrified borders.”
—Ronald Reagan (b. 1911)
“I am using it [the word ‘perceive’] here in such a way that to say of an object that it is perceived does not entail saying that it exists in any sense at all. And this is a perfectly correct and familiar usage of the word.”
—A.J. (Alfred Jules)
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