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| The science of light's behavior, acting neither as a particle nor a wave | | The science of light's behavior, acting neither as a particle nor a wave |
| [[Image:Photonics Naval Sea Systems Command Photonics Mast Array attribution.jpg|thumb|right|A photonic mast that housed a infrared digital camera atop its telescoping arm - Image by Naval Sea Systems Command]]
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| == Subcategories ==
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| *'''[[:Category:Microwave photonics|Microwave photonics]]''' - the generation, transmission and manipulation of microwaves
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| *'''[[:Category:Photochromism|Photochromism]]''' - the reversible transformation of a chemical species between two forms by the absorption of electromagnetic radiation
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| *'''[[:Category:Photoluminescence|Photoluminescence]]''' - or PL, a process in which a substance absorbs photons and then re-radiates photons
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| *'''[[:Category:Photothermal effects|Photothermal effects]]''' - the production of thermal energy produced by the photoexcitation of materials
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| *'''[[:Category:Radiative recombination|Radiative recombination]]''' - the process by which an ion binds an electron to produce a new state with subsequent radiation of photons
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| *'''[[:Category:Spontaneous emission|Spontaneous emission]]''' - the process by which a light source undergoes a transition to a state with a lower energy and emits a photon
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| [[Category:Lasers,_lighting_&_electrooptics|{{PAGENAME}}]] | | [[Category:Lasers,_lighting_&_electrooptics|{{PAGENAME}}]] |