Saturday, May 23, 2009

Conclusion

There are numerous ways an object or organism car emit light. As seen in fluorescence, something can absorb photons and re-emit them at a different wavelength. In this process, the energy that collides and excites the electron, that quickly moves down to ground state emitting that energy as visible light. Fluorescence is responsible for the glow in black light. In phosphorescence, the electron gets excited but is put in a metastable phase where the electron thinks it is stable. The electrons are gradually freed from this state and they emit a photon when falling back to ground state; they continue to emit light after the source of energy is removed allowing them to glow-in-the-dark. Triboluminescence gains its energy by breaking positive and negative ions apart and emitting the energy, that is trying to bridge the gap, as light (5). The process of producing light by a chemical reaction is chemiluminescence (7). One form of chemiluminescence is bioluminescence. As seen in many sea creatures, organisms can emit light by oxidizing the luciferin in their bodies and emit light (4). All these types of luminescence are the “escence” of light.

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