According to the Bohr's Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?

Options

A. `n= 6 " to " n=1`
B. `n=5 " to " n = 4`
C. `n=6 " to " n = 5`
D. `n=5 " to " n = 3`

Answer

C

Explanation

Energy of photon obtained from the transition `n=6 " to " n=5` will have least energy
`DeltaE=13.6 z^2 (1/(n_1^2)-1/(n_2^2))`