FLUORESCENCE
When electromagnetic radiation falls on the certain
crystalline substance, visible or ultraviolet light is emitted from the crystal.
This phenomenon is called fluorescence. Fluorescent is a form of light emission
within 10 -8 of x-ray exposure. If the emission
of light delayed beyond 10 -8 is called phosphorescence .actually
the crystal absorbs the radiation of shorter wavelength which produces excitation
in the crystal.this is called FLUORESCENCE
0 comments: