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Which mechanism causes spectral broadening when dye molecules undergo rapid dephasing?

A)Heisenberg Uncertainty Principle
B)Boltzmann Distribution tail
C)Raman scattering frequency shift
D)Fermi's Golden Rule variation

💡 Explanation

The Heisenberg Uncertainty Principle causes spectral broadening, because shorter lifetimes of excited states create greater uncertainty in energy via the Time-Energy Uncertainty relation; therefore, broadened spectral lines are observed, rather than discrete frequencies due to longer lived states.

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