Fluorescence works because the fluorescent molecule
A) absorbs light at one wavelength and emits light at a longer wavelength.
B) absorbs light at one wavelength and emits light at a shorter wavelength.
C) absorbs light at one wavelength and emits light at the same wavelength.
D) absorbs light at many wavelengths and emits light at many wavelengths.

Question

Quizplus · Accepted Answer

Fluorescence occurs when a molecule absorbs light at one wavelength and then emits light at a longer wavelength. This happens because the absorbed energy is partially lost before the photon is emitted, resulting in a photon of lower energy and thus a longer wavelength.

Fluorescence Works Because the Fluorescent Molecule