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Lab 7 - Physics Lab Lab 7 The Spectrum of the Hydrogen Atom...

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Physics Lab Lab 7 – The Spectrum of the Hydrogen Atom Aleksey Zelenberg
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Introduction This experiment consisted of two parts. In the first part, we determined the lattice  grating to an accuracy of five significant figures. In the second part, we measured the  spectrum of the Hydrogen Atom by observing the Balmer Series. By recording the  angles at which the different colors of the Balmer series appear, we determined their  initial energy level n i . The given value of the grating lattice constant (600 lines mm -1 falls within the error range of our calculated value (see Results). In addition, except for  dark purple, the accepted n i  (initial energy level) values all fall within the error range of  our results (see Results).  Procedure i To obtain the grating lattice constant we observed the left and right angles of the first  order yellow line from the spectrum of a helium lamp. We then used the following  equation:
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In analyzing the spectrum of hydrogen atoms, we repeated the above procedure but  used a hydrogen lamp instead of a helium discharge lamp. We then recorded the left  and   right   angles   of   the   color   strips   corresponding   to   the   Balmer   series:   Red,  Blue/Green, Purple, and Dark Purple. Using the equation above along with Balmer’s  formula:  , we found an expression relating n i , d, and  θ
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