c161l20_10_22 - Heisenberg Uncertainty Principle How do we...

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Heisenberg Uncertainty Principle Heisenberg Uncertainty Principle W How do we know where things are or where they will be? W The experiment changes the answer W Many forms Cannot know momentum and position to infinite precision Also time and energy 2 4 h = Δ Δ π h p x
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Sch Sch ö ö dinger dinger s s equation equation W Description of probability of finding a particle in a given volume is some function ψ 2 W Gives a relationship between the wavefunction and energy t ih E z y x V z y x m = = + + + ψ ) , , ( 2 2 2 2 2 2 2 2 h
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Energy and Orbitals Energy and Orbitals W Each orbital is identified by a set of quantum numbers In the absence of electric or magnetic fields, all orbitals at a given level (shell) have the same energy The quantum number associated with the energy level is called the principal quantum number n = × = , , 3 , 2 , 1 1 10 178 . 2 2 18 K n n J E system electron one any for n Z J E × = 2 2 18 10 178 . 2
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c161l20_10_22 - Heisenberg Uncertainty Principle How do we...

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