Kev cuam tshuam ntawm cov khoom emissivity ntawm hluav taws xob ntsuas kub: Yuav luag txhua yam khoom muaj nyob hauv qhov tsis yog lub cev dub. Tus nqi hluav taws xob ntawm tag nrho cov khoom siv tiag tiag tsis yog nyob ntawm qhov wavelength ntawm cov hluav taws xob thiab qhov kub ntawm cov khoom, tab sis kuj yog nyob ntawm cov khoom siv uas tsim cov khoom, cov txheej txheem kev npaj, txheej txheem thermal, thiab lub xeev thiab ib puag ncig. Yog li ntawd, nyob rau hauv thiaj li yuav kom txoj cai ntawm dub lub cev hluav taws xob siv rau tag nrho cov khoom siv, ib tug proportionality yam uas muaj feem xyuam rau cov khoom ntawm cov khoom thiab lub xeev ntawm lub nto yuav tsum tau qhia, uas yog lub emissivity. Qhov coefficient no txhais tau hais tias kaw qhov hluav taws xob hluav taws xob ntawm ib qho khoom tiag tiag rau ntawm lub cev dub, thiab muaj tus nqi ntawm xoom thiab tus nqi tsawg dua 1. Raws li txoj cai ntawm hluav taws xob, tsuav yog qhov emissivity ntawm cov khoom paub. , cov yam ntxwv hluav taws xob infrared ntawm txhua yam khoom tuaj yeem paub.
