Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. In most cases, the emitted light has a longer wavelength, and therefore a lower photon energy, than the absorbed radiation.

What is fluorescence in simple terms?

Fluorescence is the light given off by certain substances when it absorbs light or other electromagnetic radiation. First the substance absorbs the energy, then it emits light. ... Fluorescence in the life sciences is a way of tracking biological molecules.

Is fluorescence in a diamond good or bad?

In most cases fluorescence is simply an identifying characteristic and not a performance characteristic, and is therefore NEITHER good nor bad. In some cases, strong or very strong fluorescence can make a diamond appear cloudy, diminishing its transparency and eye appeal.