Ed Leedskalnin and Magnets?
Most recent answer: 07/18/2012
- Laura (age 24)
Ham Lake, MN United States
I looked at some of his videos and explanations. They are certainly not main stream physics, in fact....
Amongst other strange things he believes in are magnetic monopoles. They have been searched for time and time again with no success. That doesn't say they don't exist only that there is no experimental evidence nor need for them. The current state of affairs in electricity and magnetism can be summed up in Maxwell's equations, an elegant theory that explains it all. It takes a bit of calculus to extract some of the subtleties of these equations but the everyday consequences can be easily demonstrated using common tools, such as a compass needle and a wire carrying some current.
If you are interested in some elementary ideas of magnetism I suggest you watch the video of an MIT open course lecture on the subject:
(published on 07/18/2012)
Follow-Up #1: More on coral rocks, Ed Leedskalnin and magnets
- Laura (age 24)
Ham Lake MN United States
If all you want to do is to move coral rocks around you should not fool around with magnets but instead consult a competent civil engineer or building contractor. Coral rocks are mainly made out of calcium carbonate. They don't give a fig about magnetic fields. You can't magnetize them, at all.
As to your latest video, you can make one of these so-called tripole things out of two simple bar magnets. Just stick them end to end so that they repel each other. The pair form what one calls a magnetic quadrupole field whereas a single bar magnet will give you a dipole field. There are no monopoles involved. Again, Professor Maxwell explains it all.
(published on 07/19/2012)
Follow-Up #2: Are there magnetic monopoles?
- Justin (age 25)
Levittown, Pa, USA
The recent construction of "artificial magnetic monopoles" in condensed matter systems has no bearing at all on our previous answers. These "monopoles" are actually dipoles, but in which the two poles can move around almost independently so long as they stay within the particular condensed matter system. The divergence of B remains zero.
Genuine magnetic monopoles may in fact exist, as implied by some cosmological models, but only at extraordinarily low concentrations. If they do exist, Maxwell's equations would of course have to be modified to include a del•B term dependent on the monopole density as well as a curlXE term dependent on the monopole current. That would be appealing because it would complete the symmetry between E and B. I don't see offhand what it would have to do with quaternions, nor do I see why it would be make any problems for the simple Heaviside notation that we use today. It certainly has nothing to do with Leedskalin or other cranks.
(published on 08/03/2013)