1. UV ke eng? Pele, a re hlahlobeng mohopolo oa UV. UV, ke hore ultraviolet, ke hore ultraviolet, ke leqhubu la motlakase le nang le leqhubu le pakeng tsa 10 nm le 400 nm. UV ka lihlopha tse fapaneng e ka aroloa ka UVA, UVB le UVC. UVA: e nang le leqhubu le lelelele ho tloha ho 320-400nm, e ka phunyeletsa ...
Bala haholoanyane