Peb yuav tsom mus rau yuav ua li cas blackbody hluav taws xob blackbody hluav taws xob Piv txwv li, lub cev dub ntawm chav tsev kub (300 K) nrog ib square meter ntawm thaj chaw saum npoo yuav tawm ib lub photon hauv qhov pom (390–750 nm) ntawm ib qho Tus nqi nruab nrab ntawm ib photon txhua 41 vib nas this, txhais tau tias, rau feem ntau cov hom phiaj, xws li lub cev dub tsis tawm hauv qhov pom ntau yam. https://en.wikipedia.org › wiki › Black-body_radiation
Black-lub cev hluav taws xob - Wikipedia
xav txog lub hnub ua qhov kaj. … Ib yam khoom uas muaj kab noj hniav raws li tau piav saum toj no tuaj yeem ua lub cev dub, vim nws nqus lub teeb thiab tsis rov ua dua cov hluav taws xob mus txog thaum nws lub zog nyob rau hauv thermal sib npaug nrog cov khoom hauv lub cev nws tus kheej.
Puas lub hnub coj li lub cev dub?
Lub Hnub, nrog qhov ntsuas kub zoo ntawm kwv yees li 5800 K, yog kwv yees lub cev dub nrog cov emission spectrum peaked nyob rau hauv nruab nrab, daj-ntsuab ib feem ntawm pom spectrum, tab sis nrog lub zog tseem ceeb hauv ultraviolet ib yam nkaus.
Dab tsi yog lub cev dub hauv lub hnub ci zog?
Ib lub cev dub txhais tau tias yog lub cev zoo tshaj plaws uas tso cai rau txhua qhov xwm txheej hluav taws xob nkag mus rau hauv nws (zero reflectance)thiab qhov ntawd absorbs sab hauv txhua qhov xwm txheej hluav taws xob (zero transmittance).
Planck piav qhia txog lub cev dub li cas?
Planck txoj cai hluav taws xob, kev sib raug zoo lej tsim nyob rau xyoo 1900 los ntawm German physicist Max Planck los piav qhia txog spectral-zog kev faib hluav taws xob ntawm hluav taws xob tawm los ntawm blackbody(lub cev hypothetical uas absorbs tag nrho. tag nrho cov hluav taws xob hluav taws xob poob rau ntawm nws, nce mus txog qee qhov sib npaug, thiab tom qab ntawd rov ua dua …
Lub cev twg yog lub cev dub?
Nyob hauv physics, lub cev dub (hauv qhov kev nkag siab zoo) yog ib yam khoom uas nqus tag nrho cov hluav taws xob hluav taws xob uas poob rau ntawm nws, yam tsis muaj hluav taws xob hla dhau los lossis ua. reflected los ntawm nws. Vim nws tsis muaj kev cuam tshuam lossis xa cov teeb pom kev, cov khoom tshwm dub thaum nws txias.
