Figure shows the enegry levels `P, Q, R, S` and `G` of an atom where `G` is the ground state. A red line in the emission spectrum of the atom can be obtaned by an energy level change from `Q` so `S`. A blue line can be obtained by following energy level change

Options

A. `P` to `Q`
B. `Q` to `R`
C. `R` to `S`
D. `R` to `G`

Answer

D

Explanation

If `E` is the energy radiated in transition
then `E_(R rarr G) gt E_(Q rarr S) gt E_(R rarr S) gt E_(Q rarr R) gt E_(P rarr Q)`
For getting blue line energy radiated should be
maximum `(E prop (1)/(lambda))`. Hence (d) is the correct option.