Temperatură de culoare

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Temperatura de culoare este o caracteristică a luminii vizibile, care are aplicații importante în iluminat, tehnica fotografierii, tehnica înregistrărilor video, tehnica tipăririi și în multe alte domenii. Temperatura de culoare a unei surse de lumină se determină prin compararea cromaticității cu aceea a radiației unui corp negru. Temperatura de culoare este valoarea radiației unui corp absolut negru fierbinte - măsurată în Kelvin (K) - care este asemenea cu aceea a culorii sursei de lumină.

Temperaturi de culoare mai ridicate (peste 6000 K) corespund culorilor reci (gama verde-albastru) și temperaturi de culoare mai scăzute (2700-3000 K) pentru culorile calde (gama galben-roșu).

Câteva exemple de temperaturi de culoare sunt:

Sursa Temperatura (K)
Lumânare 1925
Lampă cu vapori de sodiu 2200
Lampă cu filament din wolfram 2500-3500
Lampă cu halogen 3400
Lampă fluorescentă 4000-5000
Cer senin 5000-6500
Lampă cu vapori de mercur 6000
Cer moderat acoperit 6500-8000
Cer puternic acoperit/in umbra 8000-10000

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