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What is the maximum number of emission ...

What is the maximum number of emission lines when the excited electron of a H atom in `n = 6` drop to the ground state?

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`n_2 = 6 , n_1 =1`
No of lines emitted during transiton from ` 6th` orbit to ` 1st` orbit `= Sigma Delta n = Sigma ( 6-1) = Sigma = 15`.
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P BAHADUR-ATOMIC STRUCTURE-Exercise 9
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