Lub International Date Line yog dab tsi thiab vim li cas nws tseem ceeb?
Lub International Date Line yog dab tsi thiab vim li cas nws tseem ceeb?

Video: Lub International Date Line yog dab tsi thiab vim li cas nws tseem ceeb?

Video: Lub International Date Line yog dab tsi thiab vim li cas nws tseem ceeb?
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Nws nyob ib nrab ntawm lub ntiaj teb los ntawm lub thawj meridian -the zero degrees longitude tsim nyob rau hauv Greenwich, England, nyob rau hauv 1852. Lub International Date Line ua haujlwm raws li "kab demarcation" cais ob hnub sib law liag. Thaum koj hla txoj kab hnub, koj dhau los ua tus neeg taug kev raws sijhawm!

Tsuas yog li ntawd, dab tsi yog hnub thoob ntiaj teb kab thiab vim li cas nws thiaj xav tau?

Cov International Date Line muab tus qauv txhais tau tias ua tus xav tau kev hloov kho: cov neeg taug kev mus rau sab hnub tuaj hla lub kab muab lawv daim ntawv qhia hnub rov qab rau ib hnub, thiab cov neeg taug kev mus rau sab hnub poob tau teem sijhawm ib hnub ua ntej.

Tsis tas li ntawd, txoj kab hnub thoob ntiaj teb ua haujlwm li cas? Cov International Date Line (IDL) yog kev xav - thiab arbitrary - kab nyob rau lub ntiaj teb saum npoo uas khiav ntawm North Ncej mus rau South Ncej. Thaum koj hla IDL, hnub thiab hnub hloov. Yog tias koj hla nws mus rau sab hnub poob, hnub mus tom ntej los ntawm ib qho, thiab lub hnub nce los ntawm ib tug.

Ntawm no, hnub thoob ntiaj teb kab lus teb yog dab tsi?

Lub sij hawm khaws cia los ntawm txoj kab kev xav uas khiav los ntawm Greenwich, England, hu ua Prime Meridian . Lub International Date Line yog ib txoj kab kev xav uas nyob ib nrab ntawm lub ntiaj teb ntawm kwv yees li 180 degrees longitude uas cais ib hnub los ntawm lwm qhov. Yog tias koj hla International Date Line, hnub hloov pauv.

Lub sij hawm pib thiab xaus qhov twg hauv ntiaj teb?

Tsuas yog sab hnub tuaj ntawm New Zealand lub me me Chatham Islands yog qhov pom tsis pom International Hnub Kab. Lub Chatham Islands yog specks ntawm thaj av thiaj li nthuav tawm lawv zoo li nyob rau hauv kev txaus ntshai ntawm raug cua tshuab los ntawm Roaring Forties. Sab hnub tuaj ntawm lawv yog thaj chaw uas cov ntiaj teb pib thiab xaus txhua hnub.

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