Necessity
Some implications of the displacement current follow, which agree with experimental observation, and with the requirements of logical consistency for the theory of electromagnetism.
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Famous quotes containing the word necessity:
“Central heating, French rubber goods, and cookbooks are three amazing proofs of man’s ingenuity in transforming necessity into art, and of these, cookbooks are perhaps most lastingly delightful.”
—M.F.K. Fisher (b. 1908)
“If necessity is the mother of invention, then resourcefulness is the father.”
—Beulah Louise Henry, U.S. inventor. As quoted in Feminine Ingenuity, ch. 13, by Anne L. MacDonald (1992)
“The necessity of poetry has to be stated over and over, but only to those who have reason to fear its power, or those who still believe that language is “only words” and that an old language is good enough for our descriptions of the world we are trying to transform.”
—Adrienne Rich (b. 1929)