A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. Up-to which energy level the hydrogen atoms would be excited? Calculate the wavelengths of the first member of Lyman and first member of Balmer series.
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3rd energy level .
1 st member of Lyman series:transition from n=2to n=1
1st member of balmer series:transition from n=3to n=2
1 st member of Lyman series:transition from n=2to n=1
1st member of balmer series:transition from n=3to n=2
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