luminescence

Officially known as trans-1,2-diphenylethylene, aka, stilbene, or more specifically, ( E)-stilbene, is the alkene, ethene with two phenyl groups on either carbon of the parent chain. The name was derived from the Greek word stilbos, which means shining. It should also be noted, there is also a ( Z)-stilbene which is sterically hindered and less stable because of it. Also notice that ( Z)-stilbene has a melting point of 5°C to 6°C, while the melting point of ( E)-stilbene is in the 125°C area, this illustrates the significant differences between the two. Because ( E)-stilbene is so much more common than ( Z)-stilbene, this page will focus only on ( E)-stilbene. ...more on Wikipedia about "Stilbene"

Strontium aluminate (SRA, SrAl, ) is a solid odorless nonflammable pale yellow powder, heavier than water. It is chemically and biologically inert. When activated with a suitable dopant (eg. europium, then it is labeled SrAlO₃:Eu), it acts as a photoluminescent phosphor with long persistence of phosphorescence. Its CAS number is . ...more on Wikipedia about "Strontium aluminate"

Thermoluminescence (TL) dating is the determination by means of measuring the accumulated radiation dose of the time elapsed since material containing crystalline minerals was either heated ( lava, ceramics) or exposed to sunlight ( sediments). As the material is heated during measurements, a weak light signal, the thermoluminescence, proportional to the radiation dose is produced. ...more on Wikipedia about "Thermoluminescence dating"

Triboluminescence is an optical phenomenon in which light is generated via the breaking of asymmetrical bonds in a crystal when that material is scratched, crushed, or rubbed. This is a variant of luminescence; the term comes from the Greek tribein ( to rub) and the Latin lumin (light). ...more on Wikipedia about "Triboluminescence"

Umbelliferone or 7-hydroxycoumarin is a widespread natural product of the coumarin family. It occurs in many familiar plants from the umbelliferae family such as Daucus carota (carrot), coriander, Garden Angelica and deadly nightshade, as well plants from other families such as the mouse-ear hawkweed. It is a yellowish-white crystalline solid which has a slight solubility in hot water, but high solubility in ethanol. It absorbs ultraviolet light strongly at several wavelengths, leading to its use in sunscreen creams and lotions. ...more on Wikipedia about "Umbelliferone"

The Wheels of Poseidon are a biological phenomenon in which bioluminescent zooplankton create a luminescent wake from the bows of ships in the Indian Ocean. The perception from the luminescent wakes is that it resembles the spokes of a wheel, thus the name. The phenomenon is also believed to be caused by undersea earthquakes. The detonation of explosives underwater has been observed to produce the effect, which corroborates the earthquake theory. ...more on Wikipedia about "Wheels of Poseidon"

Zinc sulfide (or zinc sulphide) is a chemical compound with the formula Zn S. Zinc sulfide is a white to yellow colored powder or crystal. It is typically encountered in the more stable sphalerite (cubic) crystal structure, although the wurtzite (hexagonal) form is also known. Both of these forms are intrinsic semiconductors. The sphalerite form has a band gap of 3.54 eV at 300 K while the wurtzite form has a band gap of 3.91 eV. ...more on Wikipedia about "Zinc sulfide"

This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia . Direct links to the original articles are in the text.
If you use exact copy or modified of this article you should preserve above paragraph and put also : It uses material from the Shortopedia article about "luminescence".

MAIN PAGE MAIN INDEX CONTACT US