Qhov Sib txawv ntawm Kev Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj

Qhov Sib txawv ntawm Kev Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj
Qhov Sib txawv ntawm Kev Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj

Video: Qhov Sib txawv ntawm Kev Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj

Video: Qhov Sib txawv ntawm Kev Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj
Video: Saib Tias Ntawm neeg lub cev (update) 23/4/2019 2024, Kaum ib hlis
Anonim

Progressive Wave vs Chaw Nres Tsheb

Ntshai yog ib qho xwm txheej tseem ceeb tshwm sim hauv lub neej tiag tiag. Kev kawm ntawm nthwv dej thiab kev vibrations ua haujlwm ntev rov qab rau lub sijhawm. Cov ntsiab lus ntawm cov nthwv dej nyob ruaj khov thiab cov nthwv dej nce siab tau tham hauv ntau yam ntawm physics thiab chemistry. Cov no tau tham txog hauv mechanics, acoustics, radar technology, kev sib txuas lus thev naus laus zis, quantum mechanics thiab txawm tias suab paj nruag. Nws yog ib qho tseem ceeb kom muaj kev nkag siab zoo hauv cov nthwv dej thiab cov nthwv dej nyob ruaj khov kom ua tau zoo hauv cov haujlwm no. Hauv tsab xov xwm no, peb yuav tham txog dab tsi yog cov nthwv dej nyob ruaj khov thiab cov nthwv dej loj zuj zus, lawv lub ntsiab lus, qhov zoo sib xws ntawm cov nthwv dej nyob ruaj khov thiab cov nthwv dej loj zuj zus, yuav ua li cas cov nthwv dej thiab cov nthwv dej nyob ruaj khov raug tsim, lawv cov ntawv thov thiab thaum kawg qhov sib txawv ntawm cov nthwv dej ruaj khov thiab cov nthwv dej loj zuj zus..

Nkauj Ntsuag

Ib tug neeg kho tshuab nthwv dej yog tshwm sim los ntawm ib qho turbulence hauv nruab nrab. Cov piv txwv yooj yim rau cov tshuab tsis muaj suab nrov, av qeeg, dej hiav txwv nthwv dej. Ib nthwv dej yog ib txoj hauv kev nthuav tawm lub zog. Lub zog tsim nyob rau hauv turbulence yog propagated los ntawm cov nthwv dej. Lub sinusoidal nthwv dej yog nthwv dej uas oscillates raws li qhov sib npaug y=A sin (ωt – kx). Raws li yoj propagates los ntawm qhov chaw, lub zog nws nqa kuj yog propagated. Lub zog no ua rau cov khoom ntawm txoj kev oscillate. Nws tseem tuaj yeem txhais tau lwm txoj hauv kev raws li lub zog tau nthuav tawm los ntawm kev oscillation ntawm cov khoom. Muaj ob hom kev nce qib; uas yog, longitudinal waves thiab transverse waves. Nyob rau hauv ib tug longitudinal yoj, oscillations ntawm hais yog parallel mus rau cov kev taw qhia ntawm propagation. Qhov no tsis txhais tau hais tias cov khoom txav nrog lub nthwv dej. Cov hais tsuas yog oscillate txog qhov sib npaug ntawm qhov chaw nyob. Nyob rau hauv transverse nthwv dej, oscillation ntawm hais tshwm sim perpendicular mus rau kev taw qhia ntawm propagation. Lub suab tsis muaj tsuas yog longitudinal nthwv dej, nthwv dej ntawm ib txoj hlua yog transverse. Cov dej hiav txwv nthwv dej yog ib qho sib xyaw ua ke ntawm cov nthwv dej hla thiab cov nthwv dej ntev.

Nyob twj ywm Waves

chaw nres tsheb, uas tseem hu ua cov nthwv dej sawv, tshwm sim vim kev cuam tshuam ob lub nthwv dej zoo ib yam taug kev mus rau qhov sib txawv. Ob qhov sib txawv sinusoidal nthwv dej taug kev hauv +x thiab –x cov lus qhia tuaj yeem sawv cev los ntawm y1=A sin (ωt – kx) thiab y2=A sin (ωt + kx) raws. Qhov sib ntxiv ntawm ob qhov sib npaug no muab qhov superimposition ntawm ob nthwv dej. Yog li y1+y2=y=A [sin (ωt – kx) + sin (ωt + kx)]. Los ntawm kev ua kom qhov sib npaug no yooj yim, peb tau Y=2A sin (ωt) cos (kx). Rau qhov muab x tus nqi, qhov sib npaug ua Y=B sin (ωt), qhov yooj yim harmonic oscillation.

Dab tsi yog qhov txawv ntawm Progressive thiab Chaw Nres Nkoj Nkoj?

• Cov nthwv dej nce qib nqa lub zog ntawm lub zog los ntawm txoj kev ntawm nthwv dej. Lub nthwv dej nyob ruaj ruaj tsis nqa lub zog ntawm txoj kev.

• Yuav tsum muaj ob qhov sib npaug propagating nthwv dej los tsim nthwv dej.

• Lub amplitude ntawm ib tug nyob ruaj ruaj nthwv dej hloov nyob deb tab sis rau ib tug muab point, lub amplitude tseem ruaj. Lub amplitude ntawm txhua qhov thiab txhua qhov taw qhia ntawm nthwv dej propagating yog tib yam, muab tias nthwv dej sib xws.

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