fluorescence
- n light emitted during absorption of radiation of some other (invisible) wavelength
- He addressed old beliefs with 21st century X-ray diffraction and fluorescence tests to reveal structure and composition, swab checks for organic material (like blood), and other .
- The tests included photo- and electron microscopy, X rays, spectroscopy, ultraviolet fluorescence, thermography and chemical analyses.
- In fact, he says, both chemical analyses and a telltale yellow-green fluorescence under ultraviolet light indicate the presence of remains of a slightly different substance: the .