The emission of light by a substance following the absorption of light or other energy by the substance. The emitted light is generally of longer wavelength, and lower energy, than that absorbed. Fluorescence occurs as a result of the relaxation of valence shell electrons after their excitation to higher shells. Fluorescence is related to the concepts of atomic emission and line spectra.

Appears in modules:

Sign in or register

For an ad-free experience and access the Visionlearning Classroom, sign in or register.