MCQ
What transition in $He^+$ ion shall have the same wave number as the first line in Balmer series of hydrogen atom :
  • A
    $6 \rightarrow 4$
  •  $3 \rightarrow 2$
  • C
    $5 \rightarrow 3$
  • D
    $7 \rightarrow 5$

Answer

Correct option: B.
 $3 \rightarrow 2$
b

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