In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?
A
3→2
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B
5→2
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C
4→1
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D
2→5
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Solution
The correct option is B5→2 For visible spectrum i.e., Balmer series n2=2. Transition from 3→2 corresponds to line with lowest energy i.e., in red region. Therefore, transition from 5→2 corresponds to third line from red end.