UVA hluav taws xob yog qhov ua rau tib neeg tan. UVA rays nkag mus rau hauv qis qis ntawm cov epidermis, qhov uas lawv ua rau cov hlwb hu ua melanocytes (hais: mel-an-oh-sites) los tsim melanin. Melanin yog xim av xim uas ua rau tanning.
Y Puas yog UVA lossis UVB zoo dua rau tanning?
UVB rays ua rau tshav ntuj, thaumUVA rays ua rau tanningnrog rau cov tawv nqaij laus. Nws yog UVB rays uas cuam tshuam nrog cov protein nyob rau hauv daim tawv nqaij los hloov nws mus rau hauv vitamin D. Tanning txaj feem ntau emit UVA rays, uas yuav tsis txhim kho koj cov vitamin D.
YPuas UVA lossis UVB phem dua?
UVA rays, hos me ntsis qis dua UVB, nkag mus rau koj cov tawv nqaij ntau dua. Kev kis kab mob ua rau muaj kev puas tsuaj rau cov hlwb nyob rau sab hauv feem ntawm koj cov tawv nqaij saum toj kawg nkaus, qhov twg feem ntau cov qog nqaij hlav ntawm daim tawv nqaij tshwm sim. … Sij hawm dhau mus, UVA kuj ua rau kev laus ntxov ntxov thiab mob qog noj ntshav.
Koj puas tuaj yeem tau tan nrog qhov ntsuas UV ntawm 4?
Txawm tias UV Index tsuas yog 4, tshav kub kub tseem ua tau li ntawm 50 feeb. Sunburn tseem tuaj yeem tshwm sim thaum UV Index qis - nyob rau hnub huab cua, piv txwv li - tab sis nws feem ntau siv sijhawm ib teev lossis ntev dua. … Yog tias sab nraum zoov, nrhiav chaw ntxoov ntxoo thiab hnav khaub ncaws tiv thaiv, lub kaus mom dav dav thiab looj tsom iav dub.
YYuav ua li cas UV zoo tshaj rau tanning?
YZoo UV Index rau tanning
- UV Index 0 - 2. Tsawg raug. Lub sijhawm nruab nrab nws yuav siv sij hawm los hlawv: 60 feeb. …
- UV Index 3 - 5. Nruab nrabqib raug. Lub sijhawm nruab nrab nws yuav siv sij hawm los hlawv: 45 feeb. …
- UV Index 6 - 7. High exposure level. …
- UV Index 8 - 10. High exposure level. …
- 11+ UV Index. Qib raug heev.
