wavelength vs zaus
Zaus thiab wavelength yog ob qhov tshwm sim tau ntsib hauv yoj tshuab. Qhov zaus ntawm qhov oscillation piav qhia tias qhov xwm txheej "ntau npaum li cas". Lub wavelength ntawm ib nthwv dej piav qhia qhov ntev ntawm ib chav nthwv dej. Ob lub ntsiab lus no tseem ceeb heev hauv kev nkag siab txog thaj chaw xws li yoj mechanics, niaj hnub physics, quantum mechanics thiab electromagnetic field theory. Nws yog ib qho tseem ceeb kom muaj kev nkag siab meej hauv cov ntsiab lus no kom ua tau zoo hauv cov haujlwm no. Hauv tsab xov xwm no, peb yuav tham txog dab tsi zaus thiab wavelength yog, lawv cov ntsiab lus, qhov sib xws ntawm wavelength thiab zaus thiab thaum kawg qhov txawv ntawm wavelength thiab zaus.
Frequency
Frequency yog ib lub tswv yim sib tham hauv ntu ntu ntawm cov khoom. Yuav kom nkag siab txog lub tswv yim ntawm zaus, yuav tsum muaj kev nkag siab zoo ntawm cov lus tsa suab. Ib qho lus tsa suab tuaj yeem suav tias yog ib qho kev txav uas rov ua nws tus kheej hauv lub sijhawm teem tseg. Lub ntiaj teb revolving ib ncig ntawm lub hnub yog ib tug periodic motion. Lub satellite orbiting nyob ib ncig ntawm lub ntiaj teb yog ib tug periodic motion; txawm tias cov lus tsa suab ntawm lub pob sib npaug yog ib qho kev txav mus los. Feem ntau ntawm cov lus tsa suab peb ntsib yog ncig, linear lossis semi-circular. Ib qho kev txav mus los muaj ntau zaus. Qhov zaus txhais tau tias "ntau npaum li cas" qhov kev tshwm sim. Rau qhov yooj yim, peb siv zaus raws li qhov tshwm sim ib ob. Cov lus tsa suab ib ntus tuaj yeem yog ib yam lossis tsis sib xws. Cov khaub ncaws hnav tuaj yeem muaj qhov sib txawv ntawm qhov nrawm nrawm. Cov haujlwm xws li amplitude modulation tuaj yeem muaj ob lub sijhawm. Lawv yog cov haujlwm ua ntu zus nyob rau hauv lwm cov haujlwm raws sijhawm. Qhov kev hloov pauv ntawm qhov zaus ntawm lub sijhawm ua haujlwm muab lub sijhawm rau ib lub sijhawm. Tej yam yooj yim harmonic motions thiab damped harmonic motions kuj yog periodic motions. Yog li qhov zaus ntawm kev txav mus los kuj tuaj yeem tau siv lub sijhawm sib txawv ntawm ob qhov xwm txheej zoo sib xws. Qhov zaus ntawm lub pendulum yooj yim tsuas yog nyob ntawm qhov ntev ntawm lub pendulum thiab lub gravitational acceleration rau me me oscillations.
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 tuaj yeem txhais tau los ntawm kev sib npaug yoj. 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 lub ntsiab lus uas muaj tib ψ tus nqi, qhov txawv ntawm x qhov tseem ceeb yog lub npe hu ua wavelength ntawm lub nthwv dej. Kev sib raug zoo ntawm lub wavelength, zaus thiab qhov nrawm 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 qhov zaus.
Qhov txawv ntawm zaus thiab wavelength yog dab tsi?
• Ntau zaus txhais tau rau ob lub nthwv dej thiab kev vibrations thiab rau lwm yam kev txav mus los.
• Lub wavelength tsuas yog txhais rau nthwv dej xwb. Zaus yog ntsuas hauv hertz. Wavelength yog ntsuas hauv meters. Lub wavelength ntawm lub nthwv dej yog inversely proportional rau lub zog ntawm nthwv dej. Qhov zaus yog linearly proportional rau lub zog ntawm nthwv dej.
