Video: Dab tsi yog qhov kev ncua deb ntawm qhov sib law liag ntawm compression thiab ntawm rarefaction?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov nrug ntawm ob sib law liag compressions los yog tsis tshua muaj tshwm sim nyob rau hauv ib nthwv dej yog hu ua wavelength.
Dhau li ntawm no, qhov kev ncua deb ntawm compression thiab rarefaction yog dab tsi?
Cov nrug ntawm tus compression thiab cov tsis tshua muaj tshwm sim cheeb tsam yog qhov wavelength ntawm cov nthwv dej tshwj xeeb. Cov nrug ntawm a compression thiab lwm yam tsis tshua muaj tshwm sim ntawm ib tug longitudinal yoj yog 1/2 wave length. Lub wavelength yog nyob deb los ntawm qhov nruab nrab ntawm ib qho compression zone mus rau tom ntej.
Ib tug kuj yuav nug, dab tsi yog compression rarefaction? Txawm li cas los xij es tsis txhob crests thiab troughs, longitudinal tsis muaj compressions thiab tsis tshua muaj tshwm sim . Compression . A compression yog ib cheeb tsam nyob rau hauv ib tug longitudinal nthwv dej uas cov hais nyob ze ua ke. Rarefaction . A tsis tshua muaj tshwm sim yog ib cheeb tsam nyob rau hauv ib tug longitudinal nthwv dej uas cov hais nyob deb tshaj sib nrug.
Hais txog qhov no, qhov kev ncua deb ntawm compression thiab ib qho tsis tshua muaj nyob ib sab ntawm lambda yog dab tsi?
Wavelength Nws yog txhais los ntawm ib tsab ntawv Greek λ ( lambda ). Peb paub tias nyob rau hauv lub suab nthwv dej, qhov ua ke ntev ntawm ib compression thiab ib qho tsis tshua muaj nyob ib sab hu ua nws wavelength. Tsis tas li ntawd, cov nrug ntawm cov chaw nruab nrab ntawm ob sib law liag compressions los yog ob sib law liag tsis tshua muaj tshwm sim yog sib npaug rau nws wavelength.
Nyob deb npaum li cas yog qhov compression thiab nws qhov ze tshaj plaws tsis tshua muaj nyob hauv nthwv dej ntev?
Kev daws: Nyob deb nruab nrab a compression thiab nyob sib ze tsis tshua muaj tshwm sim yog λ/2.
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