Luminescence of Black Light

The Luminescence of Black Light
Black Light. What is it? It is a portion of the Ultra-Violet Spectrum that is invisible to our eyes. We can
not distinguish it. However, when this radiation impinges on certain materials visible light is emitted and this is
known as 'fluorescence.' Fluorescence is visible to the human eye, in that it makes an object appear to 'glow in
the dark.'
There are several sources of ultra-violet light. These sources are: the sun, carbon arcs, mercury arcs, and black
lights. In most cases, the production of ultra-violet light creates a reasonable amount of hea…