Cov khoom uas zoo emitters kuj zoo absorbers (Kirchhoff txoj cai hluav taws xob). A blackened nto yog ib qho zoo heev emitter nrog rau zoo heev absorber. Yog hais tias tib qhov saum npoo yog silvered, nws dhau los ua ib qho tsis zoo emitter thiab absorber tsis zoo. Lub cev dub yog ib qho uas nqus tag nrho lub zog ntawm lub zog uas ntog rau nws.
Vim li cas thiaj zoo absorbers zoo emitters?
Ua ntej Kirchhoff cov kev tshawb fawb, nws tau paub tias rau tag nrho cov hluav taws xob hluav taws xob, qhov piv ntawm lub zog emissive rau qhov sib nqus nqus tau zoo ib yam rau txhua lub cev tawm thiab nqus cov hluav taws xob thermal hauv qhov sib npaug ntawm cov thermodynamic equilibrium. Qhov no txhais tau hais tias ib tug zoo absorber yog ib tug zoo emitter.
Puas yog tus nqus nqus nqus tau zoo?
Cov pa phem tsis zoo yog tseem cov emitters tsis zoo, thiab tsis txhob tawm hluav taws xob sai li cov xim tsaus.
Puas zoo absorbers ntawm tshav kub kuj zoo radiator?
Ntawm qhov kub thiab txias, lub tshuab hluav taws xob zoo yuav tawm lub zog ntau dua li tsis muaj hluav taws xob tsis zoo, thiab ua rau lub cev tsis zoo nws yuav nqus tsawg dua.
Dab tsi yog qhov zoo thiab qhov phem emitters?
Cov emitters zoo ntawm IR (infra-red) hluav taws xob kuj yog cov absorbers zoo. Matt, qhov chaw dub yog qhov zoo tshaj plaws emitters thiab absorbers; thiab ci ntsa iab, lub teeb nto yog qhov phem tshaj plaws emitters thiab absorbers - qhov sib dua thiab shinier rau saum npoo, qhov ntau lub teeb nws nyiam xav.
Why darker bodies are better absorbents as well as emitters | CBSE Class7 Science Online Classes
