Yuav ua li cas iav qhov rais zaj duab xis rwb thaiv tsev ua haujlwm

Muaj peb hom hluav taws xob conduction: hluav taws xob, conduction, thiab convection. Thermal rwb thaiv tsev zaj duab xis tsuas yog siv hluav taws xob thiab convection rau insulate, thiab nws tsuas yog tiv thaiv tshav kub ntawm lub hnub.
Lub hnub ci yog tsim los ntawm lub teeb nthwv dej (electromagnetic nthwv dej) ntawm ntau pawg, thiab lub hnub ci zog yog lub zog ntawm cov hluav taws xob hluav taws xob lawv tus kheej. Tom qab tau lim los ntawm huab cua, lub zog no nce mus txog lub ntiaj teb saum npoo hauv daim ntawv ntawm lub teeb nthwv dej ntawm ntau pawg. Lub zog no hloov mus rau hauv tshav kub hauv daim ntawv ntawm hluav taws xob. Qhov siab dua lub zog, qhov ntau dua qhov kub hloov mus rau hauv.
Lub hnub ci spectrum tuaj yeem muab faib ua peb pawg spectral:
Ultraviolet spectrum band: wavelength ntawm 280-400nm. Nws yog tus cwj pwm los ntawm kev muaj zog penetrability, uas tuaj yeem ua rau melanin deposition nyob rau hauv tib neeg daim tawv nqaij thiab tob xim. Kev raug ultraviolet ntau dhau tuaj yeem ua rau mob qog noj ntshav thiab tuaj yeem ua rau cov ntaub pua plag, ntaub, ntaub, thiab cov rooj tog zaum xim kom ploj mus.
Pom pom spectral band: wavelength ntawm 380 thiab 780nm. Nws yog tus cwj pwm los ntawm tib lub spectrum uas tuaj yeem pom los ntawm qhov muag liab qab. Lub teeb pom kev tuaj yeem muab faib ua cov xim sib txawv (liab, txiv kab ntxwv, daj, ntsuab, xiav, indigo, violet), uas tsis muaj kev phom sij rau tib neeg lub cev.
Infrared spectrum band: wavelength ntawm 700 thiab 2400nm (nanometers). Nws tus yam ntxwv yog tias peb tuaj yeem hnov ​​​​qhov "tsis pom" qhov kub ntawm lub hnub ci. Nws muaj lub zog loj tshaj plaws, yog li cov cua sov kuj tseem siab.
Nyob deb thiab ze infrared rays nyob rau hauv txhua lub band tsim 53% ntawm lub hnub ci zog, ultraviolet rays account rau 3%, thiab pom lub teeb nyiaj rau 44%.