Two key organizing principles for large multicellular organisms are

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: Option B

Explanation:

No answer description available for this question.