| This expanded collection allows a study in detail of the
response of these minerals to the range of ultraviolet rays. 15
specimens approximately 1 1/2"
FLUORESCENT MINERALS
Fluorescence is the emission of light that some minerals exhibit
when exposed to ultraviolet light.
Long wave and short wave ultraviolet lights are commonly used to
cause fluorescence.
The short wave light is higher frequency light
than the long wave light.
This difference in frequency causes the
electrons to behave differently and thus may emit different color
fluorescence.
The incoming ultraviolet light is absorbed; causing weakly held
electrons in the crystal lattice to jump to higher energy levels.
When the electrons settle to their original stable energy levels,
energy is given off as fluorescence.
Weakly held electrons may result from atomic substitution
(impurities) in the atomic structure or may be present without
substitution.
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