User talk:Carandol

I have just edited your article to show that the origin of the content was from Millennium Relativity and not Special Relativity. I have no objection to the findings being presented in Wikibooks as long as the credit is properly given the millennium relativity papers in which they were originally introduced. I remind you, these are copyrighted works. Joseph A. Rybczyk

User:Rybczyk

So what is the relationship between spin and magnetism? The only spin-0 particle I know of is the Higgs Boson, so does that mean Higgs Bosons create a magnetic field? Also are there any other E&M like waves besides photons?

User:Wanderer

All charged particles produce magnetic fields, irrespective of spin, if they are moving relative to the observer.

Maxwell's equations are classical, they don't depend on the spin of the charge, and they accurately describe the behaviour of EM fields under classical conditions. Maxwell didn't need spin to explain EM, so neither do we.

Normally, the effects of spin are only visible on a quantum scale. The only exception is permament magnets. In these, every atom has spin 1/2, and they are all pointing in the same direction, producing a magnetic field. Carandol

Ok. I have been studying E&M for a while and am having trouble understanding the relationship between an Electric Field and a Magnetic Field. From looking at E&M waves as far as I can tell they are the same thing only having gone through some strange rotation transformation. User:Wanderer

Electricty and magnetism are different aspects of the same thing. In relativity, the two 3-d vectors, E and M, turn out to be the 6 spatial and temporal components of an antisymmetric tensor. If you are moving this tensor gets rotated through an imaginary angle, just like velocities do, so what looks like a pure electric field to one person can look like a mixed EM field to someone else.

E.g If you stood still next to an (hypothetical) charged particle with zero magnetic moment, you'd see an inverse square electic field and no magnetic field.

Someone else, running past you, would see the charge moving relative to them, and a moving charge is a current, so they'd see a magnetic field as well as the electric field. The equations for the transformation are similar to those for time dilation and length contraction.

While E and B both depend on the observer, the scalars $$E^2-c^2B^2$$ and $$\mathbf{E}\cdot\mathbf{B}$$ are observer independent. If one person sees electric and magnetic fields at right angles, everyone will. Carandol


 * In fact, it was Maxwell's equations that lead Einstein to formulate special relitivity in the first place. Theresa knott 21:57, 28 Apr 2004 (UTC)

Minor edits
Hi, just a quick note about marking edits as minor. This feature is for correcting typos and spelling mistakes, changes to formatting, slight changes in wording for readability or good grammar, that sort of thing. Small changes in content should not be marked as minor. Theresa knott 21:57, 28 Apr 2004 (UTC)

GR Page
Hi Carandol, I've noticed that you've posted on the GR page. I've written what little there is so far, and today I noticed some text was added to the documents. Was that you? If so, I really appreciate the help, as when I first found the page it was completely blank. Stop by my page (Lathem) if you wanna chat. Also, I'm adding a section to the GR discussion page (about the order of the Tensor section). Have a good evening.

Vector pictures, Figures 1 - 4
Thanks for putting the pictures of vectors in Figures 1 - 4 in module Modern Physics:Math:Vectors. They look quite nice. I am wondering why a gray background was used for the second two pictures.


 * I just copied them from the base text.

I am thinking of moving the scalar discussion to the beginning of the module someday and inserting a few simple un-numbered pictures showing the effect of scalars multiplied by vectors. In particular, I'm interested in showing reversal of direction when multiplying a vector by a negative scalar. Also, maybe a picture showing a vector consisting of x and y components. It may take me some time to get this done. If you plan to do this, let me know, so there's no duplication of effort.


 * I've got no such plans. For now, I'm not likely to be many diagrams at all.Carandol 13:24, 16 Jul 2004 (UTC)

Mathematically, the order of operation probably doesn't really matter for scalar and vector, but traditionally the scalar quantities seem to be shown in front of the vector when multiplied by it, like a coefficient. H Padleckas 06:54, 16 Jul 2004 (UTC)

Re Modern_Physics:Twin_Paradox
I posted something of a rant on the discussion page thereat. EvanTPeoples 00:54, 11 Feb 2005 (UTC)

Template:ModernPhysicsNav
I created this template for use in navigation on the Modern Physics book. It will help to create a standardized "look and feel" for every page in this book, as well as providing some much needed (and often forgotten) functionality. If you don't have any big problems with this (as the primary contributor), I would like to go through and add this template to every page in the book. Let me know about this, because I have all sorts of time starting next week when I can start making those edits. --Whiteknight (talk) (projects) 14:14, 30 June 2006 (UTC)


 * I already went though and added navigation templates to each page. --Whiteknight (talk) (projects) 14:21, 3 July 2006 (UTC)

Acetone peroxide synthesis
I have proposed the acetone peroxide synthesis for deletion. What do you think? Ewen 14:19, 13 November 2006 (UTC)

Image copyright
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