posted by nadya .
An atom absorbs a yellow photon in the transition from its 2s to its 3s state (see figure on the left, not drawn to scale). What color photon might it emit in a transition from the 3s to the 2p state?
Your figure is certainly not "drawn to scale." It isn't drawn at all.
For hydrogen, the energy of levels 2p and 2s are the same. Therefore the emitted color would be yellow, the same as the absorbed color.
Your missing figure may depict a different situation.