The property of emitting radiation while being irradiated. The radiation emitted is usually of longer wavelength than that incident or absorbed, e.g., a substance can be irradiated with invisible radiation and emit visible light. X-ray fluorescence is used in diagnosis.
The reaction of certain molecules upon absorption of specific amount/wavelength of light; in which those molecules emit (reradiate) light energy possessing a longer wavelength than the original light absorbed. All cells will naturally fluoresce, at least a bit. Human colon cancer cells, and precursor cells, fluoresce much more (and emit much more red light when they fluoresce) than noncancerous cells; which may lead to a new and better means of early detection.
The sending out of light from a substance which is receiving radiation.
The conversion of invisible waves (ultra-violet, x-rays etc.) to visible light by their impingement on a suitable medium.
Emission of light by a material when it is exposed to certain types of radiation (e.g., X ray or ultraviolet). This property is used in fluoroscopy.
The emission of light or ultraviolet radiation from materials subject to the interaction of ionizing radiation. Fluorescent materials are used to visualize radiation or to amplify the number of photons by converting from x rays to light.
The emission of light by a material as it absorbs radiation from outside. The radiation absorbed may be visible or invisible (e.g. ultraviolet rays or X-rays).
The emission of a longer wavelength light by a material exposed to a shorter wavelength light. Fluorescent materials, such as fluorspar, the first material found to have this property, emit light only while a light is shining on them.
The emission of light from crystals of certain substances, such as barium platinacyanide, calcium tungstate, and rare earth, which will glow when struck by x-rays.