Calculate the energies of each of these transitions

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Mercury vapour is used in as the dominant species which is excited in a traditional fluorescent light. The first and second excited states of Mercury occur at 254 and 185 nm.

(a) Calculate the energies of each of these transitions.

(b) In what region of the electromagnetic spectrum do these transitions occur?

(c) Given that these transitions occur mostly outside the visible range, how are these transitions utilised to generate typical room lighting?

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