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fluorescence

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Fluorescence \Flu'o*res"cence\, noun [From {Fluor}.] (Chemistry, Optics) A luminescence emitted by certain substances due to the absorption of radiation at one wavelength, and the almost instantaneous re-emission of radiation at another, usually longer wavelength. The re-radiation stops almost as soon as the incident radiation is halted, thus distinguishing this phenomenon from {phosphorescence}, in which re-radiation of light may continue for some time after the incident radiation is halted.

Note: The color of the radiated light typically differs from the apparent color of the material, as when green crystals of fluor spar afford blue reflections. It is due not to the difference in the color of a distinct surface layer, but to the power which the substance has of modifying the light incident upon it, by first absorbing the light to achieve an excited state, and then radiating light to resume the ground energy level. The light emitted by fluorescent substances is in general of longer wavelength than the incident light. The radiation can also be induced by ionizing radiation which is not electromagnetic, such as alpha or beta rays, and cathode rays. This property is possessed by fluorspar, uranium glass, sulphide of calcium, and many other substances. It finds use in analytical instruments to detect or measure radiation, and in some commercial applications. [1913 Webster +PJC]

From WordNet (r) 3.0 (2006) [wn]:

fluorescence

noun

1: light emitted during absorption of radiation of some other (invisible) wavelength


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In the interest of FULL DISCLOSURE, there is a particularly interesting SCREENSHOT of the home page here.

I used Abduction! for Firefox or Webpage Screenshot for Chrome to get this series of SCREENSHOTS.

Electronic Frontier Foundation Golden Key Campaign

I don't want Uncle Sam having my SIM Card private keys.

My banking ideas may have caught the attention of the Consumer Financial Protection Bureau. I like my banking to be FREE and REAL TIME and PRIVATE. I have a proposal for how the central bank could more effectively issue credit directly to the consumers through a totally automated PRIVATE NONPROFIT. We don't need for-profit banks to administer our central bank credit. We can automate that task completely. Say, "Thank you" to the scientific community. We don't need to create new money as debt. That model was corrupt and inefficient. It was a system of slavery. Consumers were owned outright by the central banks. They called it "Sovereign Debt." Have you ever heard of fractional reserve banking? Slavery by con men. That's not what we're all about around here. We are, fundamentally, advanced technologists. We can design happier societies than that. That system sucked for the average citizens. Our systems work without the intentional generation of debt as a revenue model. We are all about a smarter banking system that serves the PUBLIC INTEREST better than those financed with debt.


Consumer Financial Protection Bureau
Golden Key
3D Model of a Neuron

Saturday, February 28, 2015 3:56:27 PM Coordinated Universal Time (UTC)
Comcast is my I.S.P. My personal bank is J.P. Morgan Chase