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← ScienceWhich mechanism causes quenching observed when excited laser dye molecules interact?
A)Förster resonance energy transfer✓
B)Intersystem crossing to triplet state
C)Vibrational relaxation cascade shift
D)Bathochromic shifts in absorption band
💡 Explanation
Förster resonance energy transfer (FRET) causes quenching because the excited dye molecules transfer energy non-radiatively to nearby acceptor molecules. Therefore, emission diminishes rather than other processes that involve intramolecular energy conversion or spectral changes.
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