Kev hloov xim liab thiab xiav yog dab tsi?

Video: Kev hloov xim liab thiab xiav 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.

Ua li no, qhov hloov pauv liab yog dab tsi thiab nws 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.

Qhov thib ob, txoj kev hloov xiav tshwm sim li cas? 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.

Ib yam li ntawd, qhov hloov pauv liab rau menyuam yaus yog dab tsi?

Liab hloov yog ib txoj kev uas cov astronomers siv los qhia qhov kev ncua deb ntawm txhua yam khoom uas nyob deb heev hauv lub Ntiaj Teb. Nws yog ib qho piv txwv ntawm Doppler nyhuv.

Dab tsi yog qhov hloov pauv liab hauv ntiaj teb kev tshawb fawb?

Redshift , txav ntawm lub spectrum ntawm ib yam khoom astronomical mus rau ntev ( liab ) lub wavelengths. Nws yog feem ntau ntaus nqi rau Doppler nyhuv, ib qho kev hloov nyob rau hauv wavelength uas tshwm sim thaum ib tug muab qhov chaw ntawm nthwv dej (xws li, lub teeb los yog xov tooj cua tsis) thiab ib tug neeg soj ntsuam nyob rau hauv ceev ceev nrog kev hwm rau ib leeg.

Pom zoo:

Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?

Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation

Dab tsi xim yog phenol liab nyob rau hauv ib qho kev daws teeb meem?

Phenol liab yog cov kua qaub-puag qhia. Nws yog tsim los ntawm condensing ob moles ntawm phenol nrog ib tug mole ntawm o-sulfobenzoic acid anhydride. Phenol Liab yog siv los ua pH qhia hauv daim ntawv thov kab lis kev cai ntawm tes. Kev daws ntawm phenol liab yuav muaj xim daj ntawm pH ntawm 6.4 lossis qis dua thiab xim liab ntawm pH

Qhov tshwm sim ntawm xaiv liab lossis xiav marble yog dab tsi?

Qhov tshwm sim ntawm kos duab liab marble = 2/5. Qhov tshwm sim ntawm kev kos duab xiav marble yog tam sim no = 1/4. Qhov tshwm sim ntawm kos duab liab marble = 2/5

Vim li cas lub ntuj xiav thiab dej hiav txwv xim yog dab tsi?

'Lub hiav txwv zoo li xiav vim liab, txiv kab ntxwv thiab daj (ntev wavelength teeb) yog absorbed ntau zog los ntawm dej tshaj yog xiav (luv wavelength light). Yog li thaum lub teeb dawb ntawm lub hnub nkag mus rau hauv dej hiav txwv, nws feem ntau yog xiav uas tau rov qab los. Ib yam li ntawd, lub ntuj xiav.'