User:Yamahar1

hERE IS THE CHEMISTRY LUMINESENCE PAPER FOR MY TEACHER......YOU CAN COPY IT BUT DONT FORGET TO CITE IT!!! THANKS

Fluorescence occurs mostly in cold bodies as an optical phenomenon, where the molecular absorption of a photon causes another photon to produce and emit a longer wavelength. This longer wavelength usually is emitted as visible light. Fluorescence occurs when molecule absorbs a photon, usually in the ultraviolet range, causing the electrons to become excited. A substance that fluoresces is fluorite. Fluorite is a mineral found naturally in nature. Fluorite is most commonly used for making opalescent glass, telescopes, and camera lenses. Phosphorescence is a type of Luminescence that is related to Fluorescence. Phosphorescence is different from Fluorescence in that it absorbs energy but emits the light very slowly. When any object is exposed to light it absorbs some of the light energy. Most objects will immediately release this energy, but phosphorescence materials store the energy and release it over a period of time even during times of darkness. Two examples of Phosphorescence are Zinc sulfide and Strontium aluminates. These materials are most commonly used in glow-in-the-dark products such as vinyl, paint, and stickers. Bioluminescence is the production and emission of light by a living organism as the result of a chemical reaction, where a type of chemical energy is converted into light energy. This phenomenon is generated by an enzyme catalyzed reaction, in which the pigment luciferin is oxidized by the enzyme luciferase. This reaction can occur either inside or outside of the cell. An example of a living organism