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Magnetic Fields of Celestial Bodies (Paperback, Softcover reprint of the original 1st ed. 1994)
Loot Price: R2,951
Discovery Miles 29 510
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Magnetic Fields of Celestial Bodies (Paperback, Softcover reprint of the original 1st ed. 1994)
Series: Astrophysics and Space Science Library, 198
Expected to ship within 10 - 15 working days
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Magnetism is one of the basic properties of matter. Mankind has
trav elled a long road in discovering and utilizing magnetism, and
in this respect the ancient Chinese people have made outstanding
contribu tions. In the book 'Lu's Spring and Autumn', written near
the end of the Warring States Period, i. e. in the third century B.
C. , there is a statement on the "attraction of iron by
lodestones". So at that time it was known that magnets can attract
ferromagnetic material. At the be ginning ofthe first century A. D.
, viz. in the early years ofthe East Hang Dynasty, the famous
scholar Wang Chong wrote in his masterpiece 'Len Hen' that the
handle of a magnetic dipper pointed to the south. It was thus
discovered at the time that magnets can point to the poles of the
geomagnetic field. At the beginning of the twelfth century, during
the reign of Emperor Hui of the Sung Dynasty, in the two books
written by Zhu Yo and Xu Jin, respectively, there are descriptions
of the com pass used in navigation. This tells us that the
application of compasses was rather widespread at that time. The
distinguished scientist Sen Go (1031-1085) discovered the
declination of the terrestrial magnetic field. This is four hundred
and more years earlier than its discovery by Christopher Columbus
in 1492 during his voyage across the Atlantic Ocean. Such facts as
these manifest the important contributions of ancient China to
global civilization.
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