The light used to excite a fluorescent molecule carries … energy and has a … wavelength compared to the light that is then emitted from the molecule.
A) greater; longer
B) greater; shorter
C) the same amount of; shorter
D) less; longer
E) less; shorter

Question

Quizplus · Accepted Answer

The photon emitted by a fluorescent molecule is necessarily of lower energy and longer wavelength than the absorbed photon. Therefore the excitation light has greater energy and a shorter wavelength than the emitted light.

The Light Used to Excite a Fluorescent Molecule Carries …