Paul Dirac was a unusual person. Perhaps because Dirac's father demanded that his young son use French rather than his native English to converse with him, the young Dirac adopted the habit of silence during his childhood simply because he could not express his thoughts in French. Whatever the reason, the adult Paul Dirac was a man of silence. Dirac's silence was so intense that it inspired a little levity among physicists. In physics, the units given to physical quantities like time or length are important. Physicists, clearly in jest, have defined the unit of silence as the dirac.A few diracs—at least microdiracs— would suit everybody well at times!
Keywords: physics, units, history, humans, parents, childhood, solitude, silence, humor
John S. Rigden: Hydrogen • The Essential Element. Harvard University Press, Cambridge, Massachusetts and London, England, Third Printing 2003; p. 88-89.