Position:In vendar se vrti

In vendar se vrti


By Anonymous - Posted on 28 Mai 2010

Da se zemlja vrti, to ve danes vsak otrok. Toda kako lahko to dokažemo.
Preprosto nam to uspe s pomočjo dolgega matematičnega nihala z zadosti veliko zagonsko maso. Če poženemo tako nihalo na dolgi niti ne bo nihalo kot pričakovano vedno v isti smeri v kateri smo ga pognali. Brez vidnega zunanjega vpliva bo nihalo spreminjalo smer nihanja. Če nič v prostoru ne vpliva na gibanje nihala, potem to lahko le pomeni, da ne speminja nihalo svoje smeri pačpa, da se tla (zemlja) premikajo.

Pri ekvatorju poskus ne bi uspel saj tam nihalo niha pravokotno na os vrtenja zemlje. Čim dlje se s poskusom oddaljimo od ekvatorja, tem hitreje bo navidezno vrtenje nihala. Pri zemljepisnih polih pa se zavrti točno 360 stopinj (cel krog) na dan. Cel krog zato, ker poli ležijo na rotacijski osi zemlje in se tla pod nihalom tam v enem dnevu zavrtijo za celoten krog.

Foucaultovo nihalo

3. januarja leta 1851 je francoski fizik Jean Bernard Léon Foucault v kleti svoje hiše izvedel prav ta poskus in tako dokazal, da se zemlja vrti. Od tega dne je poskus poznan kot Foucaultev poskus z nihalom.

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