Qhov sib txawv tseem ceeb ntawm Rayleigh thiab Raman tawg yog qhov Rayleigh tawg yog ib qho tawg tawg tawg thaum Raman tawg yog qhov tsis sib xws.
Kev tawg ntawm cov hluav taws xob xws li lub teeb thiab lub suab yog hais txog kev muab hluav taws xob los ntawm txoj kev ncaj nraim vim qhov tsis sib xws ntawm qhov nruab nrab uas cov hluav taws xob dhau mus. Muaj ob hom kev tawg paj li Rayleigh thiab Raman tawg. Lawv txawv ntawm ib leeg raws li kev txuag lossis tsis txuag lub zog kinetic uas peb hu ua elastic lossis inelastic tawg raws li.
Rayleigh Scattering yog dab tsi?
Rayleigh tawg yog ib daim ntawv ntawm lub teeb tawg ntawm lub teeb lossis lwm yam hluav taws xob hluav taws xob, muaj npe tom qab tus kws tshawb fawb Lord Rayleigh (John William Strutt). Elastic scattering txhais tau hais tias daim ntawv ntawm kev tawg paj no khaws cia lub zog kinetic ntawm qhov xwm txheej ntawm cov kab ke uas qhov tawg tuaj yeem tshwm sim. Yog li ntawd, cov photons tawg ntho muaj lub zog tib yam li qhov xwm txheej photons.
Daim duab 01: Cov xim xiav ntawm lub ntuj yog qhov tshwm sim ntawm Rayleigh tawg ntawm lub teeb nyob rau hauv qhov chaw.
Rayleigh tawg tsis hloov lub xeev ntawm cov khoom. Yog li ntawd, peb muab nws lub npe hu ua "tus txheej txheem parametric". Cov khoom uas koom nrog hauv qhov tawg no tuaj yeem yog atom lossis molecules. Hom kev tawg no tshwm sim thaum lub teeb dhau los ntawm cov pob tshab thiab cov kua dej. Txawm li cas los xij, peb tuaj yeem pom nws tseem ceeb hauv cov pa roj. Daim ntawv no ntawm lub teeb tawg yog qhov tshwm sim ntawm polarizability ntawm cov khoom nyob rau hauv nruab nrab los ntawm qhov nws hla.
Raman Scattering yog dab tsi?
Raman tawg yog ib daim ntawv ntawm inelastic tawg ntawm lub teeb lossis lwm yam hluav taws xob hluav taws xob, muaj npe tom qab tus kws tshawb fawb C. V. Raman. Lub sij hawm inelastic piav qhia tias hom kev tawg no tsis txuag lub zog kinetic ntawm qhov xwm txheej. Nyob rau hauv lwm yam lus, lub kinetic zog ntawm lub system (nyob rau hauv uas lub teeb scattering tshwm sim) los yog poob los yog nce. Cov khoom uas cuam tshuam nrog Raman tawg tuaj yeem yog electrons, atoms lossis molecules. Hauv cov pa roj, hom kev tawg ntawm lub teeb no tshwm sim nrog kev hloov pauv ntawm lub zog ntawm cov molecules. Qhov no yog vim qhov kev hloov pauv ntawm cov molecule ntawm ib qib zog mus rau lwm qhov.
Qhov txawv ntawm Rayleigh thiab Raman Scattering yog dab tsi?
Rayleigh tawg yog ib daim ntawv ntawm lub teeb tawg ntawm lub teeb lossis lwm yam hluav taws xob hluav taws xob thaum Raman tawg yog ib daim ntawv ntawm inelastic tawg ntawm lub teeb lossis lwm yam hluav taws xob hluav taws xob. Yog li ntawd, qhov sib txawv tseem ceeb ntawm Rayleigh thiab Raman tawg yog lawv cov elastic thiab inelastic xwm, feem. Ntxiv mus, raws li qhov sib txawv tseem ceeb no, peb tuaj yeem txiav txim siab lwm qhov sib txawv ntawm Rayleigh thiab Raman tawg. Ntawd yog, lub elastic scattering yog ib daim ntawv ntawm kev tawg paj uas txuag lub zog kinetic ntawm qhov xwm txheej ntawm cov kab ke uas qhov tawg tuaj yeem tshwm sim. Tab sis, daim ntawv inelastic ntawm kev tawg paj tsis txuag lub zog kinetic ntawm qhov xwm txheej.
Cov duab hauv qab no nthuav tawm cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm Rayleigh thiab Raman tawg.
Summary – Rayleigh vs Raman Scattering
Kev tawg ntawm hluav taws xob hluav taws xob muaj nyob hauv ob hom xws li Rayleigh thiab Raman tawg. Txawm hais tias muaj qee qhov sib txawv ntawm lawv, qhov sib txawv tseem ceeb ntawm Rayleigh thiab Raman tawg yog tias Rayleigh tawg yog ib qho tawg tawg tawg thaum Raman tawg yog qhov tsis sib xws.
