Video: Yuav ua li cas astronomers siv Doppler nyhuv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Astronomers siv cov nyhuv doppler los kawm txog kev txav ntawm cov khoom thoob plaws lub ntiaj teb, los ntawm cov ntiaj chaw nyob ze extrasolar mus rau kev nthuav dav ntawm cov galaxies nyob deb. Doppler hloov yog qhov kev hloov ntawm qhov ntev ntawm nthwv dej (lub teeb, suab, thiab lwm yam) vim qhov kev sib txheeb ntawm qhov chaw thiab txais.
Hauv qhov no, cov kws tshawb fawb siv cov nyhuv Doppler los ntsuas qhov tseeb ntawm cov hnub qub?
Cov Doppler nyhuv tshwm sim rau lub teeb thiab suab. Piv txwv li, astronomers niaj hnub txiav txim siab ceev npaum li cas hnub qub thiab galaxies yog txav deb ntawm peb los ntawm ntsuas qhov twg lawv lub teeb yog "stretched" rau hauv qis zaus, liab ib feem ntawm lub spectrum.
Ib tug kuj yuav nug, Doppler nyhuv siv li cas? Cov Doppler nyhuv yog siv txhawm rau ntsuas qhov nrawm pom cov khoom uas lub radar beam raug rho tawm haujlwm ntawm lub hom phiaj txav. Piv txwv li, tub ceev xwm siv radar los ntes lub tsheb ceev. Ib yam li ntawd, Doppler radar yog siv los ntawm cov chaw nres tsheb huab cua los xam cov yam xws li cua ceev thiab kev siv zog.
Hais txog qhov no, yog vim li cas Doppler nyhuv tseem ceeb rau cov astronomers?
Cov Doppler nyhuv yog tseem ceeb hauv astronomy vim hais tias nws ua rau kom ceev ceev ntawm lub teeb-emitting khoom nyob rau hauv qhov chaw, xws li cov hnub qub los yog galaxies, ua hauj lwm tawm.
Doppler effect qhia dab tsi rau cov kws tshawb fawb txog lub ntiaj teb?
Nws ua haujlwm nrog txhua hom nthwv dej, uas suav nrog lub teeb. Edwin Hubble siv lub Doppler nyhuv los txiav txim tias qhov ntug yog nthuav. Hubble pom tias lub teeb los ntawm cov galaxies nyob deb tau hloov mus rau qis zaus, mus rau qhov kawg liab ntawm lub spectrum. Qhov no yog hu ua liab Doppler hloov , los yog liab- ua haujlwm.
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