Fluorescence polarization is synonymous with fluorescence anisotropy. They can be visualized by electron microscopy or fluorescence microscopy. Plaque deposits are also visible through fluorescence and immunofluorescence microscopy. In order for a sample to be suitable for fluorescence microscopy it must be fluorescent. It is used extensively in fluorescence microscopy. Photography of the fluorescence produced by ultraviolet illumination uses visible wavelengths of light. Quantification most commonly relies on fluorescence detection. The signal can be visualized using a fluorescence or brightfield microscope. MAHLI has both white and ultraviolet LED illumination for imaging in darkness or fluorescence imaging. Fluorescent blue is a shade of blue that is radiant based on fluorescence. Currently, relatively little is known about the functional significance of fluorescence and fluorescent proteins. This is achieved through the use of competitive fluorescence in situ hybridization. This is done by imaging using a fluorescence microscope. Methods using HPLC with fluorescence detection were reported. The thiols are then separated by HPLC and the fluorescence quantified with a fluorescence detector.