is the property of some materials to glow brightly when stimulated
by high energy wavelengths of light. The glow of fluorescence
is caused when the fluorescent material absorbs the high energy
light and re-emits the light at a lower frequency rather than
just reflecting the light. Fluorescent materials appear to
"glow" under normal daylight near dawn and dusk,
or on cloudy days, when the glow of the objects is not obliterated
by intense daylight. You can stimulate fluorescent materials
using UV, Blue, or sometimes even Green LED light.
important to note that this is different from "glow in
the dark" materials which continue to glow after the
light is removed. For fluorescent materials, once the light
is turned off they do not continue to glow. They need the
energy from the light to produce their interesting effects.
a picture of some fluorescent and non-fluorescent objects
under normal light. Note that they are all easily distinguishable,
but nothing special seems to be happening.
your mouse over the photo to see what they look like under
blue LED light.
which items glow brightly and appear to be their original
color. The blue-bodied flashlight on the end reflects the
blue light, but is otherwise unremarkable and appears the
same color as the carpet. The end yellow, and middle green,
OD and black-bodied lights just absorb the blue LED light.
The bright yellow and orange lights take the blue light, absorb
it, and re-emit it at a lower frequency. As a result they
appear to be glowing and are their proper color under monochromatic
blue light! Under normal daylight they do the same thing,
especially under dim or twilight conditions. This is why fluorescent
materials appear to "glow" and tend to be much more
visible than their regular counterparts.