User:Dvigna/Hair analysis

ALS (Alternate Light Source)
Alternate sources of light can help visualize hair, as they may fluoresce. One wavelength of light may not work on every type of hair, since the colour of hair varies between individuals. The hair will absorb the wavelength of light that is released by the ALS. The light energy from the ALS will displace electrons within the atoms of the hair. Energy will be liberated from the hair once the electrons return to their original placement within the atom. This allows for the hair to fluoresce, a phenomenon known as fluorescence. The use of ALS in order to visualize hair can be useful in photographs taken during criminal investigations.