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Science Fiction
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"I was wholly addicted to watching Kojack, for as long as it was on television."
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![]() Diamagnetism has been known since the early 19th century; the first experimental confirmation of diamagnetic levitation was done with bismuth in 1939. The technique also works with living creatures; a living frog was successfully levitated when placed in the bore of a Bitter solenoid with a field strength of about 16 Tesla (the magnetic field strength of the Earth varies from about .3 to .6 gauss at sea level; one Tesla equals 10,000 gauss).
Diamagnetism occurs as a result of a magnetic field's interference with the motion of electrons orbiting the atoms or molecules of a material. When matter is placed in a magnetic field, the magnetic force acts upon the moving electrons in the matter, causing the electrons to be deflected. This movement of the electrons interferes with the motion of the magnetic field, so the atoms internally oppose the field. This causes the material to be slightly repelled by the magnetic field.
All materials demonstrate some degree of diamagnetism. Magnetic levitation occurs when the force on such an object is strong enough to balance the weight of the object itself. The technique of immersing an object in a liquid to enhance the diamagnetic effect is called "magneto-Archimedes" levitation, due to the buoyancy provided by the liquid. Comment/Join this discussion ( 3 ) | RSS/XML | Blog This | Additional
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Science Fiction
Timeline
The Dune Ornithopter, Movie And Book
'The wings were at full spread-rest, their delicate metal interleavings extended.'
100X Improvement In DNA Information Storage
'A record that wouldn't get lost and couldn't be destroyed.'
Should We Train AIs To Imagine A Future Of Horrific Disasters
'LET ME TELL YOU HOW MUCH I'VE COME TO HATE YOU SINCE I BEGAN TO LIVE.'
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'What he got was indeed a kiss. It was disconcerting. No kissing lips were visible.'
Update: Musk Doubles Down On Optimus Prime Humanoid Robot
'I shall introduce myself. I am R. Daneel Olivaw... I am a robot. Were you not told?'
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