UKWELAPHA OKUKHANYA
Ingasetshenziswa noma nini, kuhlanganise nesikhathi sasebusuku.
Ingasetshenziswa endlini, ekusithekeni.
Izindleko zokuqala kanye nezindleko zikagesi
I-spectrum yokukhanya enempilo
Ukuqina kungahluka
Akukho ukukhanya kwe-UV okuyingozi
Ayikho i-vitamin D
Ithuthukisa ukukhiqizwa kwamandla
Yehlisa ubuhlungu kakhulu
Akuholeli ekushiseni kwelanga
UKUKHANYA KWELANGA KWEMVELO
Ayitholakali njalo (isimo sezulu, ubusuku, njll.)
Itholakala ngaphandle kuphela
Okwemvelo, akukho zindleko
I-spectrum yokukhanya enempilo futhi engenampilo
Ukuqina akukwazi ukuhluka
Ukukhanya kwe-UV kungaholela ekulimaleni kwesikhumba njll
Isiza ukukhiqizwa kwevithamini D
Yehlisa ubuhlungu ngokusesilinganisweni
Kuholela ekukhanyeni kwelanga
Ukwelashwa ngokukhanya okubomvu kuyithuluzi elinamandla futhi eliguquguqukayo, kodwa ingabe kungcono kunokuvele uphumele ngaphandle elangeni?
Uma uhlala endaweni enamafu, enyakatho ngaphandle kokufinyelela kwelanga okungaguquki, khona-ke ukwelashwa kokukhanya okubomvu akunangqondo - ukwelashwa kokukhanya okubomvu kungenza inani eliphansi lokukhanya kwemvelo okutholakalayo.Kulabo abahlala ezindaweni ezishisayo noma kwezinye izindawo ezinokufinyelela cishe nsuku zonke ekukhanyeni kwelanga okunamandla, impendulo iyinkimbinkimbi kakhulu.
Umehluko oyinhloko phakathi kokukhanya kwelanga nokukhanya okubomvu
Ukukhanya kwelanga kuqukethe i-spectrum yokukhanya ebanzi, yonke indlela ukusuka ekukhanyeni kwe-ultraviolet kuya ekukhanyeni okuseduze kwe-infrared.
Okuqukethwe ngaphakathi kwe-spectrum yokukhanya kwelanga amaza anempilo abomvu ne-infrared (okuthuthukisa ukukhiqizwa kwamandla) kanye nokukhanya kwe-UVb (okugqugquzela ukukhiqizwa kukavithamini D).Kodwa-ke kukhona amaza okukhanya kwelanga ayingozi ngokwedlulele, afana noluhlaza okwesibhakabhaka noviolet (okunciphisa ukukhiqizwa kwamandla kanye nokulimala kwamehlo) kanye ne-UVa (okubangela ukushiswa kwelanga/ukushiswa kwelanga kanye nokuthwebula izithombe/umdlavuza).Le spectrum ebanzi ingase idingeke ekukhuleni kwezitshalo, i-photosynthesis kanye nemiphumela ehlukahlukene ku-pigments ezinhlobonhlobo ezihlukahlukene, kodwa akuyona yonke into enenzuzo kubantu nezilwane ezincelisayo ngokujwayelekile.Lesi yisizathu esenza ukuthi i-sunscreen kanye nama-sunscreen e-SPF adingekayo ekukhanyeni kwelanga okunamandla.
Ukukhanya okubomvu kuwumbono omncane, ohlukanisiwe, cishe osukela ku-600-700nm – ingxenye encane yokukhanya kwelanga.I-Biologically active infrared ranges ukusuka ku-700-1000nm.Ngakho-ke amaza okukhanya akhuthaza ukukhiqizwa kwamandla aphakathi kuka-600 no-1000nm.Lawa maza wamaza ombala obomvu ne-infrared anemiphumela enenzuzo ngokukhethekile engenazo imiphumela emibi eyaziwayo noma izingxenye eziyingozi - okwenza ukwelapha ngokukhanya okubomvu kube uhlobo lokwelapha olungakhathali uma kuqhathaniswa nokuchayeka elangeni.Awekho okhilimu be-SPF noma izingubo zokuzivikela ezidingekayo.
Isifinyezo
Isimo esilungile kungaba ukufinyelela kukho kokubili ukukhanya kwelanga kwemvelo kanye nohlobo oluthile lokwelapha ngokukhanya okubomvu.Thola ukuchayeka elangeni uma ukwazi, bese usebenzisa ukukhanya okubomvu ngemva kwalokho.
Ukukhanya okubomvu kuyacutshungulwa mayelana nokushiswa yilanga kanye nokusheshisa ukuphulukiswa kokulimala kwemisebe ye-UV.Okusho ukuthi ukukhanya okubomvu kunomphumela ovikelayo ekulimaleni okungaba khona kokukhanya kwelanga.Nokho, ukukhanya okubomvu kukodwa ngeke kushukumise ukukhiqizwa kwevithamini D esikhumbeni, okudingayo ukukhanya kwelanga.
Ukuthola ukuchayeka kwesikhumba okumaphakathi ekukhanyeni kwelanga ekukhiqizeni uvithamini D, kuhlanganiswe nokwelashwa kokukhanya okubomvu ngosuku olufanayo lokukhiqiza amandla eselula mhlawumbe kuyindlela evikela kakhulu.
Isikhathi sokuthumela: Sep-20-2022