The correct order is [tex]\lambda_{P} < \lambda_{Q} < \lambda_{R}[/tex]
since we know that
wavelength = hc/E
E is the energy
for P photon energy is high as it moved from 1 to 3
for Q it will next to P
Photon P shown moves an electron from energy level n = 1 to energy level n = 3. The electron jumps down to n = 2, emitting photon Q, and then jumps [tex]\lambda_{P} < \lambda_{Q} < \lambda_{R}[/tex]
down to n = 1, emitting photon R. The spacing between energy levels is drawn to scale.
there fore order of wavelength is [tex]\lambda_{P} < \lambda_{Q} < \lambda_{R}[/tex]
What is wavelength?
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