Txhua yam qub (baryonic) teeb meem tawm hluav taws xob hluav taws xob thaum nws muaj qhov kub siab tshaj xoom xoom.
Thaum twg koj tuaj yeem cia siab tias lub cev yuav tawm hluav taws xob dub?
Txhua yam qub (baryonic) teeb meem tawm hluav taws xob hluav taws xob thaum nws muaj qhov kub siab tshaj xoom xoom.
Dab tsi ua rau lub cev dub tawg?
Cov hluav taws xob ntawm lub tshuab hluav taws xob dub yog tsim los ntawm cov khoom siv thermal ntawm cov khoom, tsis yog qhov xwm txheej ntawm cov khoom, lossis nws tau txais thermally zoo siab li cas. Qee qhov piv txwv ntawm blackbodies muaj xws li cov teeb taws teeb, hnub qub, thiab lub qhov cub kub. Cov emission tshwm sim raws li qhov txuas mus ntxiv (Daim duab 1.1.
Yuav ua li cas rau lub cev dub hluav taws xob thaum kub nce?
Raws li qhov kub ntawm lub cev dub nce, lub ncov wavelength txo qis (Wien Txoj Cai). Qhov kev siv (lossis flux) ntawm txhua qhov wavelengths nceraws li qhov kub ntawm lub cev dub nce. Tag nrho lub zog raug hluav taws xob (qhov chaw nyob hauv qhov nkhaus) nce nrawm nrawm thaum qhov kub nce siab (Stefan–Boltzmann Law).
Lub cev dub ua haujlwm li cas?
Blackbody, kuj sau lub cev dub, hauv physics, ib qhov chaw uas nqus tag nrho lub zog hluav taws xob poob rau ntawm nws. Lub sij hawm tshwm sim vim qhov xwm txheej pom lub teeb yuav nqus tau ntau dua li qhov xav tau, thiab yog li ntawd qhov saum npoo yuav tshwm dub.
