Magnetna privlačnost

moderator: Miha Žorž, RTV SLO
author: Jurij Bajc, Pedagoška fakulteta, Univerza v Ljubljani
author: Rudi Čop, Laboratorij za geomagnetizem in aeronomijo, Visokošolsko središče Sežana
author: Mojca Čepič, Odsek za teoretično fiziko, Institut "Jožef Stefan"
author: Miha Kos, Ustanova Hiša eksperimentov
produced by: RTV SLO
published: May 15, 2012,   recorded: January 2011,   views: 299
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Description

Zemlja ima močno magnetno polje. To nastaja zaradi majhne razlike med hitrostmi vrtenja Zemlje in njenega jedra. Prav to magnetno polje varuje Zemljo pred premočnimi učinki Sončevega vetra in pred vesoljskim sevanjem. Ko sočni veter zadene Zemljino magnetno polje, se močno naelektreni delci spuščajo proti poloma. Ob prihodu v atmosfero trčijo ob njene delce in sprosti se različno valovanje. Vidni del teh valovanj vidimo kot severni sij ali auroro borealis. Magnetni pol se spreminja s časom. Od časa do časa menja svojo usmerjenost. Prav tako se spreminja njegova jakost. Zadnje raziskave kažejo, da se je zadnji obrat magnetnih polov zgodil pred 700.000 leti. Vse to in še več v oddaji o magnetni privlačnosti Zemlje.

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Comment1 Muhammad Sajid Sheikh , January 5, 2015 at 9:31 p.m.:

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