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Spectroscopy Experiment Prelab Exercise Name Sec Turn in at the beginning of your laboratory session The value of the Rydberg constant for Helium ion (He) is Re 4.39x 10 m (note this is different than the value for Hydrogen!) The energy levels of the Helium ion are given by the formula E Ri hc(1 ) where cis the speed oflight (3.00x10 ms) and his Plancksco stant (6.626 ?O 34 J-s/photon). 1. Calculate the energy of the levels for n-1 and n-3 Calculate the energy CAE), wavelength, and frequency of a photon associated with the transition n-3 to n-1 for the Helium ion. 2. 3. Does the transition n-3 to n-1 involve the absorption or emission of a photon? Chemistry 125 Laboratory Manual-2018 Page 5
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