4 ms·
For example, super conductors can 'freeze in' magnetic fields. This means, that the super conductor can essentially only move along the field lines. ( Found thi
by yk 14y ago
For example, super conductors can 'freeze in' magnetic fields. This means, that the super conductor can essentially only move along the field lines. ( Found this video [1], which shows the effect.)
With the same effect you can 'levitate' objects, for example a bookshelf. So there would be endless possibilities for novelty toys.
[1] https://www.youtube.com/watch?v=TeS_U9qFg7Y https://www.youtube.com/watch?v=TeS_U9qFg7Y
- ajuc 14y agoWon't regular electromagnet work the same way, just constantly use energy? EDIT: ok, nevermind, it won't. http://en.wikipedia.org/wiki/Magnetic_levitation http://en.wikipedia.org/wiki/Magnetic_levitation http://en.wikipedia.org/wiki/Earnshaw%27s_theorem http://en.wikipedia.org/wiki/Earnshaw%27s_theorem
- tgb 14y agoEarnshaw's theorem only applies to static electromagnetic fields. An electromagnet coupled with some sensors and a computer can give feedback to make stable levitation. But, as you said, it would constantly use energy.