Quiz14_solutions

Quiz14_solutions - Physics 222 Fall 2011...

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Unformatted text preview: Physics 222 Fall 2011 Name:_______________ Section:______________ Quiz 14A 1) An electron is trapped in a square infinitely deep well (box) with a width of 0.50nm a. Find the ground level energy. Solution = = m L h n m p E n n 2 2 2 2 8 2 m L h E 2 2 1 8 = ( 29 ( 29 ( 29 kg m Js E 31 2 9 2 34 1 10 11 . 9 10 50 . 8 10 63 . 6--- = ; eV J E 51 . 1 10 41 . 2 19 1 = =- b . Suppose that the wells width is reduced by one half, what is the new ground level energy? Solution = = = 2 1 2 1 1 2 2 1 1 2 8 a b a a b E L L E E m L h E a b E E 1 1 4 = ; eV E b 03 . 6 1 = 2) Hydrogen atom. a. What is the energy of a hydrogen atom with the principal quantum number n=3? Solution - = 2 6 . 13 n eV E n 2 3 3 6 . 13 eV E- = ; eV E 5 . 1 3- = b. Electron in a hydrogen atom makes transition from the state with the principal quantum number n=3 to the state with n=1. Find the wavelength of emitted photon....
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Quiz14_solutions - Physics 222 Fall 2011...

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