Ulwakhiwo lweemolekyuli zeIzifunxi ze-UVidla ngokuba neebhondi ezimbini ezidityanisiweyo okanye iiringi zevumba elimnandi, ezinokufunxa imisebe ye-ultraviolet yamaza athile (ngokuyintloko i-UVA kunye ne-UVB).

Xa imisebe ye-ultraviolet ikhanyisa iimolekyuli ezifunxayo, ii-elektroni ezikwiimolekyuli ziyatshintsha ukusuka kwimeko yomhlaba ziye kwimeko yovuyo, zifunxa amandla emisebe ye-ultraviolet.

Emva kokufunxa ukukhanya kwe-ultraviolet, imolekyuli ikwimeko yovuyo enamandla aphezulu. Ukuze ibuyele kwimeko yomhlaba ezinzileyo, iimolekyuli ezifunxayo ziya kukhupha amandla ngeendlela ezilandelayo:
①Utshintsho olungelulo olusebenzisa imitha: guqula amandla abe ngamandla obushushu uze uwakhuphele kwindawo engqongileyo.
②Ukukhanya okanye i-phosphorescence: inxalenye yamandla inokukhululwa ngendlela yokukhanya okubonakalayo (ngokungafane kwenzeke).

Ngokufunxa imisebe ye-ultraviolet nokuyiguqula ibe ngamandla obushushu, izifunxi ze-UV zinciphisa umonakalo othe ngqo wemitha ye-ultraviolet kwizinto (ezifana neeplastiki, iingubo) okanye ulusu.
Kwiimveliso ze-sunscreen, izinto ezifunxa i-UV zinokuthintela imitha ye-UV ukuba ingangeni eluswini kwaye zinciphise umngcipheko wokutshiswa lilanga, ukufiphala kwefoto kunye nomhlaza wesikhumba.

ZethuIzifunxi ze-UVzilungele iipolymers, iipeyinti kunye nezinto zokuthambisa. Ukuba ufuna iimveliso, nceda uzive ukhululekile ukunxibelelana nathi, siza kuphendula zingadlulanga iiyure ezingama-48.