Look up: photon

1. Photon
   A packet of light or electromagnetic radiation; also called quantum of light
   Found on http://home.nas.net/~dbc/cic_hamilton/di
   
   
2. Photon
   A particle with energy equal to a single quanta. The energy of the particle is proportional to frequency. Electromagnetic energy may sometimes be considered to be wave-like, and at other times, particle-like. At frequencies above the millimeter-wave band, the energy is more often considered to be...
   Found on http://www.coseti.org/glossary.htm
   
   
3. Photon
   A discrete quantity of electromagnetic energy. Short wavelength (high frequency) photons carry more energy than long wavelength (low frequency) photons. See Electromagnetic Radiation.
   Found on http://hesperia.gsfc.nasa.gov/sftheory/g
   
   
4. Photon
   a quantum unit of electromagnetic energy.
   Found on http://www.tulane.edu/~bmitche/book/glos
   
   
5. Photon
   The carrier particle of electromagnetic interactions.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
6. Photon
   . A representative of the quantum nature of light. It is considered as the smallest unit of light.
   Found on http://www.zoo.co.uk/~z0001325/Glossary.
   
   
7. Photon
   The photon is the elementary particle of Electromagnetic energy and represents quanta of energy. For Radiation Protection purposes they are represented by Gamma Rays and X-Rays Photons (Non-Ionising Radiation would of course include light Photons). They are taken to have no mass and no electrical charge.
   Found on http://www.ionactive.co.uk/glossary.html
   
   
8. photon
   [n] - a quantum of electromagnetic radiation
   Found on http://www.webdictionary.co.uk/definitio
   
   
9. Photon
   The smallest unit of light.
   Found on http://www.delscope.demon.co.uk/astronom
   
   
10. Photon
    A quantum of electromagnetic radiation.
    Found on http://www.encyclo.co.uk/local/20474
    
    
11. Photon
    The quantum of electromagnetic radiation. The phenomenon of light can be described as a series of photons; this is an alternative to wave theory.
    Found on http://www.encyclo.co.uk/visitor-contrib
    
    
12. Photon
    A packet of light or electromagnetic radiation, also called quantum of light.
    Found on http://www.allchemicals.info/index/actio
    
    
13. Photon
    All matter absorbs and emits electromagnetic radiation in discrete small quantities called photons. The energy of a photon (E) varies withthe frequency of the radiation according to:
    Found on http://www.encyclo.co.uk/visitor-contrib
    
    
14. photon
    (h) quantum; quanta. A discrete packet of energy associated with electromagnetic radiation. Each photon carries energy E proportional to the frequency of the radiation: E = h, where h is Planck's constant.
    Found on http://antoine.frostburg.edu/chem/senese
    
    
15. photon
    Photon is an elementary particle of zero mass and spin 1/2. The photon is involved in electromagnetic interactions and is the quantum of electromagnetic radiation. The photon may also be regarded as a unit of energy equal to E = h·? where h is Planck constant and ? is the frequency of the radiation.
    Found on http://www.ktf-split.hr/periodni/en/abc/
    
    
16. Photon
    a quantum unit of electromagnetic energy.
    Found on http://www.chemicalglossary.net/definiti
    
    
17. Photon
    A particle of electromagnetic radiation having zero mass.
    Found on http://www.chemicalglossary.net/definiti
    
    
18. Photon
    All matter absorbs and emits electromagnetic radiation in discrete small quantities called photons. The energy of a photon (E) varies withthe frequency of the radiation according to:
    Found on http://www.chemicalglossary.net/definiti
    
    
19. Photon
    A quantum of light; the smallest (nonzero) amount of energy which can be transferred via radiation at a given wavelength.
    Found on http://www.nhm.ac.uk/hosted_sites/pe/200
    
    
20. photon
    an energy packet E of electromagnetic radiation related to the frequency f of the radiation by the relationship E= hf,where h is Planck`s constant Category: Physics
    Found on http://www.mijnwoordenboek.nl/definition
    
    
21. photon
    <physics> A quantum unit of light energy. ... (09 Oct 1997) ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
22. photon
    noun a quantum of electromagnetic radiation; an elementary particle that is its own antiparticle
    Found on http://wordnetweb.princeton.edu/perl/web
    
    
23. photon
    (fo´ton) a discrete particle (quantum) of radiant energy.
    Found on http://www.encyclo.co.uk/local/21001
    
    
24. photon
    minute energy packet of electromagnetic radiation. The concept originated (1905) in Einstein`s explanation of the photoelectric effect, in which he ... [57 related articles]
    Found on http://www.britannica.com/eb/a-z/p/61
    
    
25. photon
    photon 1. The quantum of electromagnetic radiation, which by definition, travels at the speed of light. 2. The quantum of the electromagnetic field that manifests itself by absorption or emission only in multiple quantum units of energy. 3. A unique massless particle that carries electromagnetic force.
    Found on http://www.wordinfo.info/words/index/inf