Pictures of Magnets that look like the Helisphere

This paper might be worth a look www.sciencedirect.com/science?_ob=Articl...e93c41a679505af1ea68

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Stoat</i>
<br />This paper might be worth a look www.sciencedirect.com/science?_ob=Articl...e93c41a679505af1ea68
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

"The effective refractive index of a granular composite with graded metallic magnetic particles randomly embedded in a host matrix is investigated. Based on differential effective dipole approximation (DEDA) and ClausiusMossotti relation, we calculated the effective refractive index of the graded granular composite. It is found that there exists a frequency region, where the effective refractive index is negative. And the gradient profiles of permittivity and magnetic permeability inside particles can affect the effective negative refractive index significantly. The gradient profile of permittivity plays more important role in an enhancement of effective negative refractive index than that of magnetic permeability, whereas it is on the contrary in the adjustment of characteristic frequency, at which the effective negative refractive index reaches to a maximum. Therefore, in theoretical, it is possible to gain an enhancement of the effective negative refractive index and appropriate characteristic frequency by adjusting the gradient profiles of permittivity and magnetic permeability inside particles."

Wow. No real idea what they mean; other than it may be related.

I just take pretty pictures. [8D]

www.sendspace.com/folder/on9dhg

BTW, they did give me a degree in physics. What were they thinking? &lt;silly college&gt; []

Zerp's Universal Law --- Dude, The Hot Side Faces Away From the Gravity Well ---

Hi Sir Zerp, if they'd said, we took a pile of tiny magnets, of varying sizes, degreased them, then slung them into a tray, the guy that hands out research money might have thought he was as clever as them. That would never do, he/she wouldn't give them the money they wanted.

There's a broad hint in there that they are talking frequencies, rather than frequency. Then there's mention of negative refractive index. I was talking in the pub about this and found that people were okay with the idea of refractive index when it concerned something they could see through, like a diamond or their beer glass.

Though really everything has a refractive index. c = 1 / sqrt (mu * epsilon) where mu is the permeability of free space and epsilon is the permittivity of free space. We have materials that have a negative permeability, or negative permittivity but not both at once. So, make a whole bunch of tiny split rings of a material that has a negative permeability. The gap is a capacitor. What we have is a tank circuit. Then we create a grid of tiny wires that have a negative permitivity. The result is a thin film lens with a negative refractive index.

Why bother? Think about a sine wave, half of it is going faster than light, a lens loses half of the information.. Coat the lens with a neg r.i. material and we have a superlens, hurrah!!

So why is this only being done now? I suppose the answer has to lie in that square root. A negative times a negative gives a positive. Some crazy Russian said to himself, "what If?" The permitivity and permeability are complex, they have real and imaginary roots.

All of this stuff on superlenses was on the net, as little as a year ago. It's now hard to find, as the people working on it got to work on making Klingon cloaking devices for the military. I kid you not. Wrap something in a skin of neg r.i. material and it disappears!!

Getting neg r.i. over a frequency range therefore is worth megabucks. Think nano scale holographic circuits, just of the top of my head that it's almost like the laser, nobody knew what to do with it at first.

Ah, as you like doing pretty pictures. Why not get a bunch of Buddhist monks in to do those sand pictures they do. Only don't tell them that you've given them tiny graded magnets. Start them off on something simple at first, slap in some ferrofluid and bob's your uncle [8D][]

(Edited) Hang about [}] Sack the monks and kidnap the college Xerox technician. As I recall the system uses slightly magnetic inks. Perhaps it could be adaped to use micron sized magnets. This would have the benefit of the mental picture of dozens of out of work monks adrift on a storm tossed raft [][}][}]

A bit more. Perhaps a very fine gel to print your patterns on (Julian sets maybe?) then stack them in a gel solvent and a magnetic field. Add the ferrofluid. Trial and error I suppose. Solvent first, then place in field, or the first way? Don't know.

http://www.sendspace.com/pro/dl/3hchd6

I do like taking pretty pictures and finding the math within them.

http://www.sendspace.com/pro/dl/69vacu

Sorry, I haven't been on the board much. These are research pictures and I can't get anyone to pay attention. What do you do when you have the next great thing in science and no one cares? Tuning lasers, multiple light paths on a silicon chip, optical computing all come to mind. I went to a APS conference in march and gave a ten minute talk. They looked bored. Never dreamed I could have data and math and real world applications and there would be zero interest.

http://www.sendspace.com/pro/dl/4yice2

The sendspace folder (from two messages ago) is still active. I wrote a good introduction to my paper (item #2) if anyone is interested. Maybe a getting a much of Buddhist monks together would be a good idea. Some of my photos remind of the images they draw.

Oh well, I could sell my photos as art. Gee, a collge phyics degree to become an artist.

Zerp's Universal Law --- Dude, The Hot Side Faces Away From the Gravity Well ---

BTW, I did check to see if the light was being polarized.

I know I don't show it, but I did think of checking for such things. The linear polarizing filters didn't have much of a effect. Then again, my light sources aren't coherent.

Going by Snell's law, my stuff is changing the speed of light related to the magnetic field vectors. Has to be, otherwise the light wouldn't curve.

BTW, the lines it gives, per my first photo above, is constant magnetic scalar potential.

Zerp's Universal Law --- Dude, The Hot Side Faces Away From the Gravity Well ---