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 P
C. R to S
D. R to G

Answer

D

Explanation

If E is the energy radiated in transition , then form figure
`" " E_(RtoG)gtE_(Qtos)gtE_(RtoS)gtE_(QtoR)gtE_(PtoQ)`
For obtaining blue line energy radiated should be be more. Hence, correct option is (d)