SCIENCE|natural and applied sciences|physical sciences · TRANSPORT
- solas Reference an Ghníomhaireacht Eorpach Comhshaoil (GEC)
- ga
- light | visible radiation
- en
- Definition optical radiation capable of causing a visual sensation directly on a human being Reference "International Electrotechnical Commission > International Electrotechnical Vocabulary (Electropedia) > 731-01-04, http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=731-01-04 [29.1.2018]"
- Comment "Nominally covering the wavelength in vacuum range of 380 nm to 800 nm.Reference: International Electrotechnical Commission > International Electrotechnical Vocabulary (Electropedia) > 731-01-04, http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=731-01-04 [29.1.2018]There are no precise limits for the spectral range of visible radiation since they depend upon the amount of radiant power reaching the retina and the responsivity of the observer. The lower limit is generally taken between 360 nm and 400 nm and the upper limit between 760 nm and 830 nm.Reference: Reference: International Electrotechnical Commission > International Electrotechnical Vocabulary (Electropedia) > 845-01-03, http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-01-03 [29.1.2018]Visible light is electromagnetic radiation whose wavelength falls within the range to which the human retina responds, i.e. between about 390 nm (violet light) and 740 nm (red). White light consists of a roughly equal mixture of all visible wavelengths, which can be separated to yield the colours of the spectrum, as was first demonstrated conclusively by Newton. In the 20th century it became apparent that light consists of energy quanta called photons which behave partly like waves and partly like particles. The velocity of light in a vacuum is 299 792 km per second.Reference: ‘light’. Oxford Dictionaries. https://en.oxforddictionaries.com/definition/light [29.1.2018]"
- lumière | rayonnement visible
- fr
- Definition rayonnement considéré du point de vue de sa capacité d'exciter l'organe de la vision ;rayonnement considéré du point de vue de sa capacité d'exciter l'organe de la vision(rayonnement visible) ; rayonnement susceptible de produire directement une sensation visuelle ; attribut de toutes les perceptions ou sensations qui sont particulières à l'organe de la vision et se produisent par son intermédiaire Reference VEI 45-25-125 ;OMM,Vocabulaire météorologique international ; VEI 45-5-25 ; VEI 45-25-125
- lux
- la