Phosphorescence
is related to fluorescence in that the phosphorescent does not re-emit the
radiation it absorbs. It is a process in which the absorbed energy of a
substance is released relatively slowly inn the form of light. One example of
this is the glow in the dark stick. The stick will glow even brighter if it is
exposed in a light material. Another example that is a phosphorescent
associated in algal division are the Pyrocystis fusiformis. They are dinoflagellates
and can glow brighter at lighter conditions
