otsese päikesekiirguse osa, mis on võimeline esile kutsuma nägemisaistingut
Good to know
Eesti keeles tähendab termin valgus üksnes nähtavat kiirgust.
part of direct solar radiation capable of causing a visual sensation
Good to know
When dealing with actinic effects of optical radiations, this term is commonly used for radiations extending beyond the visible region of the spectrum.
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