Question

Fluorescence occurs when

a.

a molecule returns to the electronic ground state from an excited triplet state by losing it's excess energy as a photon

b.

a molecule returns to the electronic ground state from an excited singlet state by losing it's excess energy as a photon

c.

a molecule lowers its vibrational energy by losing it's excess energy as a photon

d.

none of the above

Answer: (b).a molecule returns to the electronic ground state from an excited singlet state by losing it's excess energy as a photon

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Q. Fluorescence occurs when

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