Video: Red shift blue shift yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Redshift thiab blueshift piav li cas lub teeb hloov mus rau luv luv los yog ntev wavelengths raws li cov khoom nyob rau hauv qhov chaw (xws li hnub qub los yog galaxies) txav los ze zog los yog deb ntawm peb. Thaum ib yam khoom txav deb ntawm peb, qhov kaj yog ua haujlwm mus rau liab kawg ntawm lub spectrum, raws li nws wavelengths tau ntev.
Tom qab ntawd, qhov hloov pauv liab qhia li cas?
' Liab hloov ' yog lub ntsiab lus tseem ceeb rau astronomers. Lub sij hawm tuaj yeem nkag siab qhov tseeb - lub wavelength ntawm lub teeb yog ncab, yog li lub teeb pom tau tias yog ' ua haujlwm ' rau ntawm liab ib feem ntawm spectrum. Ib yam zoo li no tshwm sim rau lub suab nthwv dej thaum lub hauv paus ntawm lub suab txav mus rau tus neeg soj ntsuam.
Ib tug kuj yuav nug, ua li cas xiav hloov pauv tshwm sim? Doppler blueshift yog tshwm sim los ntawm kev txav ntawm qhov chaw mus rau tus neeg soj ntsuam. Lub sij hawm siv tau rau txhua qhov kev txo qis hauv wavelength thiab nce zaus tshwm sim los ntawm kev txheeb ze, txawm tias sab nraum qhov pom spectrum. Cov hnub qub nyob ze xws li Barnard's Star yog txav mus rau peb, ua rau me me heev blueshift.
puas yog xiav hloov mus lawm?
Lub sij hawm " blueshift " hais txog cov ua haujlwm nyob rau hauv wavelength ntawm lub teeb mus rau lub xiav kawg ntawm lub spectrum li ib yam khoom txav rau peb hauv qhov chaw. Redshift siv rau lub spectrum ntawm lub teeb los ntawm galaxies uas yog tsiv tawm mus los ntawm peb; uas yog, lawv lub teeb yog ua haujlwm mus rau qhov kawg liab ntawm lub spectrum.
Dab tsi yog qhov hloov pauv liab hauv chemistry?
Bathochromic ua haujlwm : Hauv spectroscopy, txoj hauj lwm ua haujlwm ntawm lub ncov lossis lub teeb liab mus ntev wavelength (qis zog). Kuj hu ua a liab hloov . Rau qhov nqus siab tshaj plaws pib ntawm λmax = 550 nm, ib ua haujlwm mus rau siab dua wavelength xws li 650 nm yog bathochromic, whereas a ua haujlwm kom qis wavelength xws li 450 nm yog hypsochromic.
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