Quantum mechanics is at the heart of everything that made the century just past so dramatically unlike the century preceding it. SN100
. “Crudely stated, the new theory holds that chance rules the physical world.” Heisenberg’s uncertainty principle “is destined to revolutionize the ideas of the universe held by scientists and laymen to an even greater extent than Einstein’s relativity.”
As for atoms, traditional physics asserts that atoms and their parts can move about “in a large number of different ways,” Harkins stated. But quantum theory maintains that “of all the states of motion prescribed by the older theory, only a certain number actually do occur.” Therefore, events previously believed “to occur as continuous processes, actually do occur in steps.”
The presence of two slits in a barrier allows light waves passing through to interfere, creating a pattern of light and dark bands on a detector screen. Electrons and other subatomic particles also exhibit such interference and so also behave as waves.The presence of two slits in a barrier allows light waves passing through to interfere, creating a pattern of light and dark bands on a detector screen.
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