Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from to of spectrum?

Question

Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from  to  of  spectrum?

Canvas Classes · Accepted Answer

For He⁺ (Z=2), transition 4→2:

For H (Z=1), find transition with same :

Try :

Answer: Option (1) —  to

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