Wavelength vs Wavenumber
wavelength thiab wavenumber yog ob lub ntsiab lus tseem ceeb uas tau tham hauv physics thiab ntau yam haujlwm. Wavelength yog qhov kev ncua deb ntawm ob lub ntsiab lus sib law liag uas nyob rau tib theem. Wavenumber yog tus naj npawb ntawm wavelengths nyob rau hauv ib qho kev ncua deb raws li kev nthuav tawm ntawm nthwv dej. Cov ntsiab lus no tseem ceeb heev hauv cov teb xws li electromagnetics, analytical chemistry, Physical chemistry, nthwv dej thiab vibrations thiab ntau yam hauj lwm. Hauv tsab xov xwm no, peb yuav tham txog dab tsi wavelength thiab yoj tus lej yog, lawv cov lus txhais, thiab thaum kawg qhov txawv ntawm wavelength thiab wavenumber.
wavelength
Wavelength yog ib lub tswv yim sib tham hauv qab nthwv dej. Lub wavelength ntawm nthwv dej yog qhov ntev uas cov duab ntawm nthwv dej pib rov ua nws tus kheej. Qhov no tseem tuaj yeem txhais tau tias siv qhov sib npaug nthwv dej. Rau ib lub sij hawm nyob ntawm yoj sib npaug ψ (x, t), nyob rau hauv ib lub sij hawm muab, yog ψ (x, t) yog sib npaug rau ob x qhov tseem ceeb thiab tsis muaj cov ntsiab lus ntawm ob qhov tseem ceeb muaj tib ψ tus nqi, qhov txawv ntawm x Qhov tseem ceeb yog hu ua lub wavelength ntawm yoj.
Lwm lub ntsiab lus rau wavelength tuaj yeem muab siv rau theem. Wavelength yog qhov kev ncua deb ntawm ob lub ntsiab lus sib law liag ntawm nthwv dej uas nyob hauv tib theem.
Kev sib raug zoo ntawm wavelength, zaus, thiab tshaj tawm ntawm nthwv dej yog muab los ntawm v=f λ qhov twg f yog qhov zaus ntawm nthwv dej thiab λ yog lub wavelength. Rau ib lub nthwv dej muab, txij li lub nthwv dej tshaj tawm tas li, lub wavelength ua inversely proportional rau zaus.
Wavenumber
Wavenumber yog lwm yam khoom tseem ceeb ntawm nthwv dej. Wavenumber txhais tau tias yog tus naj npawb ntawm wavelengths nyob rau hauv ib qho kev ncua deb. Muaj ob lub ntsiab wavenumber ntsuas. Qhov thib ib yog tus naj npawb ntawm wavelengths ib 2π meters. Qhov no yog siv dav hauv physics thiab lej qauv ntawm nthwv dej nrog rau quantum mechanics. Tus nab npawb no yog siv "k" thiab nws tseem hu ua angular wavenumber.
Lwm daim ntawv yog tus naj npawb ntawm wavelengths ib 1 cm. Cov lus txhais no tau siv dav hauv chemistry. Lub wavenumber no feem ntau yog txhais los ntawm "ν" (lub Greek tsab ntawv Nu), thiab nws yog lub npe hu ua spectroscopic wavenumber.
Cov chav nyob ntawm wavenumber txawv nyob ntawm qhov txhais tau siv. Yog tias thawj qhov txhais tau siv, nws ntsuas hauv radians ib 'meter'. Yog siv qhov txhais thib ob, tus lej wavenumber yog ntsuas hauv ib centimeter.
Wavelength vs Wavenumber
