Fluxul luminos pe unitatea de arie a unei suprafete care emite lumina, care este strabatuta de lumina sau care primeste un flux de lumina.
Posted by Tehnium.org on 01/03/2020
Fluxul luminos pe unitatea de arie a unei suprafete care emite lumina, care este strabatuta de lumina sau care primeste un flux de lumina.
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