In Bohr series of lines of hydrogen spectrum, third line from the red end corresponds to which one of the following inner orbit jumps of electron for Bohr orbit in atom in hydrogen :

Options

A. `3 rarr 2`
B. `5 rarr 2`
C. `4 rarr 1`
D. `2 rarr 5`

Answer

B

Explanation

For visible spectrum i.e., Balmer series `n_(2) = 2`. Transition from `3 rarr 2` corresponds to line with lowest energy ie., in red region. Therefore, transition from `5 rarr2` corresponds to third line from red end.