PHYA22H3 Lecture Notes - Lecture 24: Photon

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30 Mar 2019
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Electron Emission
-
Electron spin
°generates amicroscopic magnetic moment at
must also have an angular momentum 5
Se =Ms 'm Ms =If =spin quantum number
has 2possible values up or down
Pauli Excursion principle
no 2electrons in aauantum system can have the same
set of quantum numbers n,l,mand Ms
Helium Ground Helium Excited
State State
25 -#
Is #o g-
Excited States and spectra
lowest energy level is preferred
2ways to get to an excited state
-collision
-absorption
Absorption
°Of aphoton Of frequency :
f=Deaton =Eza
hh
N=of =he
D. Eaton
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