The carbocation intermediate formed in the last step is resonance-stabilized. Draw the other resonance structure (using the carbon skeleton provided) and add curved arrow(s) to convert the first resonance structure into the second one.

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?