Ntxhais VS Reflection
Kev xav thiab kev tawg yog ob qhov tshwm sim pom hauv ntau lub tshuab. Reflection yog tus txheej txheem ntawm kev hloov ntawm txoj kev ntawm ib qho particle lossis nthwv dej vim tsis muaj kev sib tsoo. Scattering yog ib qho txheej txheem uas muaj kev sib cuam tshuam ntawm ob qhov sib tsoo uas tshwm sim. Ob qho ntawm cov xwm txheej no tseem ceeb heev hauv kev ua haujlwm xws li mechanics, geometrical optics, lub cev optics, kev sib raug zoo, quantum physics thiab ntau yam haujlwm. Nws yog ib qho tseem ceeb kom muaj kev paub zoo hauv kev xav thiab kev tawg paj kom thiaj li ua tau zoo hauv cov haujlwm no. Hauv tsab xov xwm no, peb yuav tham txog dab tsi kev xav thiab kev tawg yog dab tsi, lawv cov ntsiab lus, qhov zoo sib xws ntawm kev xav thiab tawg paj, lawv daim ntawv thov, thiab thaum kawg qhov sib txawv ntawm kev xav thiab tawg.
Txoj kev tawg yog dab tsi?
Kev tawg yog ib qho txheej txheem uas ua lub luag haujlwm tseem ceeb hauv ntau yam ntawm physics thiab chemistry. Scattering yog cov txheej txheem uas nthwv dej sib txawv vim qee qhov tsis txaus ntseeg hauv qhov chaw. Cov ntaub ntawv hluav taws xob xws li lub teeb, suab thiab txawm tias me me tuaj yeem tawg. Qhov ua rau ntawm kev tawg tuaj yeem yog ib qho me me, ib qho ntom anomaly lossis txawm tias ib qho chaw tsis muaj zog. Kev tawg tuaj yeem suav tias yog kev sib cuam tshuam ntawm ob qhov sib txawv. Qhov no yog qhov tseem ceeb heev hauv kev ua pov thawj yoj particle duality ntawm lub teeb. Rau qhov pov thawj no, Compton Effect raug coj mus. Yog vim li cas lub ntuj xiav kuj yog vim tawg. Qhov no yog vim qhov tshwm sim hu ua Rayleigh tawg. Lub Rayleigh tawg ua rau lub teeb xiav ntawm lub hnub tawg ntau dua li lwm cov wavelengths. Vim li no, cov xim ntawm lub ntuj yog xiav. Lwm hom kev tawg yog Mie tawg, Brillouin tawg, Raman tawg thiab inelastic X-ray tawg
Kev xav yog dab tsi?
Reflection yog qhov tshwm sim feem ntau tau tham hauv optics, tab sis kev xav kuj tseem muaj cov ntawv thov hauv ntau yam. Rau lub teeb, kev xav txog feem ntau yog tswj hwm los ntawm txoj cai hais tias lub kaum sab xis ntawm qhov xwm txheej yog sib npaug rau lub kaum sab xis ntawm kev xav ntawm ib qho twg. Lub kaum sab xis yog ntsuas nrog kev hwm rau qhov qub kos ntawm qhov taw tes ntawm kev xav mus rau qhov pom qhov chaw. Qee qhov chaw muaj kev cuam tshuam lub teeb pom kev tshwm sim thaum qee qhov chaw ua rau pom qhov teeb meem tshwm sim. Peb lub zeem muag yog tswj hwm los ntawm kev xav. Feem ntau ntawm cov khoom peb pom yog pom los ntawm lub teeb pom kev los ntawm lawv. Rau txhua qhov chaw no, qhov cuam tshuam ntawm txhua qhov wavelength sib txawv, yog li muab cov xim tshwj xeeb thiab kev ntxhib los mos rau saum npoo. Reflection tsis yog qhov xwm txheej. Cov khoom xws li electrons kuj qhia txog kev xav. Kev xav txog yog suav tias yog ib qho khoom ntawm qhov teeb meem.
Dab tsi yog qhov txawv ntawm Reflection thiab Scattering?
• Scattering is a yoj khoom ntawm qhov teeb meem whereas reflection is a particle property.
• Scattering yuav tsum muaj tag nrho nqus thiab emission ntawm ib tug hais los yog ib tug photon, whereas reflections tsuas bounces rov qab qhov teeb meem particle los yog yoj.
• Lub wavelength ntawm qhov xwm txheej nthwv dej tuaj yeem hloov pauv vim tawg, tab sis nws tsis tuaj yeem hloov pauv vim kev xav.
• Kev xav tau yooj yim pom tau, qhov kev soj ntsuam ntawm kev tawg yuav tsum muaj cov cuab yeej siv siab heev.
• Qhov qis ntawm kev xav tau tuav rau cov khoom siv cuam tshuam qhov sib npaug rau kev tawg yog nyob ntawm cov khoom siv thiab cov xwm txheej siv.
