Imibhede yokushiswa kwesikhumba isebenzisa izibani ezikhethekile ezikhipha ukukhanyaukukhanya kwe-ultraviolet (UV), okukhuthaza isikhumba ukuthi sikhiqize i-melanin — umbala obangela ukunsundu. Izinhlobo eziyinhloko zokukhanya kwe-UV ezihilelekile yilezi:
-
Imisebe ye-UVA (315–400 nm):
-
Lezi zingena zijule esikhumbeni.
-
Inesibopho somphumela omkhulu wokushiswa kwesikhumba ngokushesha.
-
Ukuchayeka kakhulu kungabangela ukuguga kwesikhumba ngaphambi kwesikhathi futhi kwandise ingozi yomdlavuza wesikhumba.
-
-
Imisebe ye-UVB (280–315 nm):
-
Thinta ungqimba lwangaphandle lwesikhumba.
-
Siza ekukhiqizeni umbala wesikhumba ohlala isikhathi eside ngokuvuselela ukukhiqizwa kwe-melanin.
-
Ukuchayeka kakhulu kungabangela ukushiswa yilanga kanye nomonakalo wesikhumba.
-
Isilinganiso se-UV emibhedeni yokushiswa kwesikhumba:
Imibhede eminingi yesimanje yokushiswa kwesikhumba isebenzisa inhlanganisela cishe95% UVA kanye no-5% UVB, yize isilinganiso esiqondile singahluka kuye ngomklamo wombhede kanye nemithetho yendawo.
Amathiphu Okuphepha:
-
Landela njalo isikhathi sokuchayeka esinconywe ngumenzi.
-
Gqoka izibuko zamehlo ezivikelayo ukuze uvimbele ukulimala kwamehlo okuhlobene ne-UV.
-
Gwema imibhede yokushiswa kwesikhumba uma unesikhumba esibucayi noma umlando womdlavuza wesikhumba.
Iphuzu Eliyinhloko:
Imibhede yokushiswa kwesikhumba isebenzisa ukukhanya kwe-UVA kanye ne-UVB ukudala umbala wesikhumba okhanyayo, kodwa zombili izinhlobo zingalimaza isikhumba sakho uma zingasetshenziswa ngendlela engafanele. Ukulinganisela kanye nokuvikela kuyisihluthulelo sokusetshenziswa okuphephile.
