Magnets ib txwm muaj ob tug ncej; sab qaum teb thiab sab qab teb ncej. Ib tug cylindrical hlau nplaum kuj muaj ob tug ncej. Cov hlau nplaum cuav tsis pom nyob hauv tebchaws Greece. Tsuas yog cov hlau nplaum ntuj tau tshawb pom hauv tebchaws Greece.
Cov hlau nplaum twg nrhiav tau hauv tebchaws Greece?
thawj cov hlau nplaum tsis tau tsim, tab sis tau pom los ntawm cov pob zeb uas tshwm sim ib txwm muaj hu ua magnetiteKev lig kev cai, cov neeg Greek thaum ub yog cov neeg nrhiav cov hlau nplaum. Muaj ib zaj dab neeg hais txog tus tswv yug yaj hu ua Magnes uas nws cov khau ntsia hlau daig rau hauv pob zeb uas muaj hlau nplaum.
Leej twg nrhiav tau cov hlau nplaum cuav?
Cov hlau nplaum cuav tau tshawb pom los ntawm William Gilbert hauv kaum rau pua hauv tebchaws Askiv.
Cov hlau nplaum cuav nrhiav tau nyob qhov twg?
Cov hlau nplaum cuav tau pom nyob hauv tim Nkij teb chaws. Cov ncej zoo sib xws ntawm cov hlau nplaum sib sib zog nqus. Qhov siab tshaj plaws hlau filings stick nyob rau hauv nruab nrab ntawm ib tug bar hlau nplaum thaum nws coj los ze lawv. Bar hlau nplaum ib txwm taw rau North-South kev taw qhia.
Thaum twg cov hlau nplaum nrhiav tau hauv tebchaws Greece?
Keeb kwm ntawm magnetism hnub rov qab mus rau the 600 BCE, qhov uas peb pom hais txog Lodestone hauv kev ua haujlwm ntawm Greek philosopher Thales ntawm Miletus. Thaum ntxov lodestone, pom nyob rau hauv Greek cheeb tsam ntawm Magnesia, Anatolia yog qhov chaw niaj hnub lub npe "sib nqus" yog muab los.
