Tom qab kev teeb tsa lub hnub ci ntawm lub ntsej muag ntawm lub khob, cov xim sib xyaw yog siv rau saum npoo ntawm iav. Tom qab cov xim nqus kom tshav ntuj, lub teeb xa mus rau txawv wavelengths mus rau lub hnub ci xovtooj ntawm lub ntug sib txuas. Mark Baldo, lub taub hau ntawm hluav taws xob kev tshawb fawb thiab kev tshawb fawb ntawm Massachusetts lub koom haum thev naus laus zis, hais tias: "Cov roj pleev xim tuaj yeem sib sau hnub ci rau ntawm qhov chaw loj xws li iav qhov rais."
Raws li cov lus ceeb toom, cov khoom siv dag zog no tsis yog tsim nyog rau iav nkaus xwb, tab sis kuj tseem rau cov phiaj yas thiab cov zoo li. Nws tseem tuaj yeem ua cov xim lossis pob tshab thiab tsis muaj kob, thaum nws siv rau lub iav qhov rai hauv cov xim pob tshab tsis muaj teeb meem thaum nruab hnub.
Cov iav tempered iav tam sim no yuav muaj lub teeb ci dua.
