energy needed to excite a hydrogen atom from its ground state to its third excited state is
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Energy to excite ground state to third excited state.
3rd excited state -> e- in [4th orbit or shell]
so, (n1=1 , n2=4)
E = E1 - E4
= 13.6 [ 1/12 - 1/42] ev
= 13.6 [1-1/16]
= 13.6 [15/16]
= 13.6x 0.9375 = [12.75ev]
E = 12.75 ev
3rd excited state -> e- in [4th orbit or shell]
so, (n1=1 , n2=4)
E = E1 - E4
= 13.6 [ 1/12 - 1/42] ev
= 13.6 [1-1/16]
= 13.6 [15/16]
= 13.6x 0.9375 = [12.75ev]
E = 12.75 ev
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