2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
In 1852, George Gabriel Stokes tau tshawb pom lub peev xwm ntawm cov qauv ntawm fluorite los tsim lub teeb xiav thaum pom lub teeb, uas hauv nws cov lus yog "tshaj qhov violet kawg ntawm lub spectrum." Nws hu qhov tshwm sim no "fluorescence" tom qab cov ntxhia fluorite.
fluorite thawj zaug pom qhov twg?
Ib qho loj tshaj plaws ntawm fluorspar nyob rau hauv North America yog nyob rau ntawm lub Burin Peninsula, Newfoundland, Canada. Thawj qhov kev lees paub ntawm fluorspar hauv cheeb tsam tau sau tseg los ntawm geologist J. B. Jukes hauv xyoo 1843. Nws tau sau tseg tias qhov tshwm sim ntawm "galena" lossis cov hlau lead thiab fluoride ntawm txiv qaub nyob rau sab hnub poob ntawm St.
keeb kwm ntawm fluorite yog dab tsi?
Nws feem ntau hu ua 'cov pob zeb muaj xim zoo nkauj tshaj plaws hauv ntiaj teb' vim nws muaj ntau yam xim ci ntsa iab. Fluorite tau piav qhia thawj zaug hauv 1530 thiab yog thawj zaug hu ua 'fluorspar'. Cov pob zeb hauv av tau pom zoo rau nws cov txiaj ntsig zoo li kev ua haujlwm ntawm txhuas thiab hlau.
fluorite tsim li cas?
Fluorite crystals tsim 150-200 lab xyoo dhau los thaum dej kub uas muaj fluorine thiab lwm yam minerals raug yuam los ntawm cov kab nrib pleb hauv lub ntiaj teb uas nws cuam tshuam nrog cov calcium uas nplua nuj limestone bedrock. Crystals tsim raws cov kab nrib pleb thiab lwm qhov chaw qhib hauv pob zeb.
Dab tsi yog xim tsis tshua muaj fluorite?
Dab tsi yog xim tsawg tshaj plaws ntawmfluorite? Ntshav los yog violet yog cov xim classic ntawm fluorite, feem ntau sib tw rau kev nplua nuj nrog amethyst. Blue fluorite yog qhov tsawg heev thiab cov neeg sau khoom tab tom nrhiav nws. Lub ci ntsa iab yellow is very rare as well.
Pom zoo:
Thaum twg veas tau sau thawj zaug?
Vedas tau hais lus los ntawm kev nco txog ntau tiam neeg thiab tau sau tseg thawj zaug ib ncig 1200 BCE. Txawm li cas los xij, tag nrho cov ntawv luam tawm ntawm Vedas uas muaj sia nyob rau niaj hnub nim no yog cov qauv uas muaj nyob rau hauv lub xyoo pua 16th AD.
Lub saxophone thawj zaug tau tsim thaum twg?
Tus neeg tsim khoom siv Belgian Adolphe Sax patented lub saxophone hauv 1846, sib txuas lub dav conical bore…… Leej twg tsim saxophone ua ntej? Vim li cas Adolphe Sax's Suab paj nruag Invention tsis tau mob hnyav. Nws siv sijhawm ntau xyoo-ib puas xyoo, nyob ntawm seb koj suav li cas-rau Adolphe Sax qhov kev tsim kho los ua nws qhov chaw hauv keeb kwm.
Puas tau txij thaum pom thawj zaug tseem ua ke?
Cov txiaj ntsig sib xyaw - kaum ob khub niam txiv tam sim no tseem ua ke tom qab Lub Caij 12. Thiab tawm ntawm cov khub niam txiv uas tseem tshuav, rau tau pib ua tsev neeg ua ke. Nyem rau ntawm lub gallery saum toj no kom paub seb leej twg Married at First Sight nkawm niam txiv tseem nyob ua ke thiab leej twg xaiv rau kev sib nrauj.
Thaum twg pom kab mob plawv thawj zaug?
Thawj piav qhia hauv 1768 los ntawm William Heberden, nws tau ntseeg los ntawm ntau tus neeg muaj qee yam ua rau cov ntshav ncig hauv cov hlab ntsha, txawm tias lwm tus xav tias nws yog ib qho mob tsis zoo, Raws li Canadian Journal of Cardiology.
Thaum twg embryology pom thawj zaug?
Niaj hnub nimno embryology yog ib txoj kev loj hlob tsis ntev los no uas muaj nws pib nrog kev tsim lub tshuab ntsuas hauv lub xyoo pua 17th century. Txawm li cas los xij lub tswv yim ntawm tib neeg tab tom txhim kho nyob rau theem tsis tau lees paub txog ntau tom qab.
