Re: is the magnetic field really moving?

On Wed, 30 Jul 2008 18:12:10 -0700 Salmon Egg <SalmonEgg@[EMAIL PROTECTED]
>
wrote:
|> In article <g6ana402...@[EMAIL PROTECTED]
>, phil-news-nos...@[EMAIL PROTECTED]
|> wrote:
|>
|> > Is the magnetic field really moving if the magnets move but the field
remains
|> > the same?
|>
|> No! How would you go about checking for motion?
| 
| Dip a bar magnet into iron filings to map the lines of force. Rotate the

| magnet and you can see the "lines" rotating with the magnet. This 
| experiment must have been performed countless times.

This would need to be a round bar to assure no variation in field with the
rotation.  Have you done this?


| On the other hand, perform an experiment with a rotating nozzle on the 
| end of a hose. Does the column of water leaving the nozzle rotate with 
| the nozzle?

That depends on whether the nozzle is the source of the water, or its
guide.
Since it is merely a guide, it is not an analogy to magnets.

-- 
|WARNING: Due to extreme spam, googlegroups.com is blocked.  Due to
ignorance |
|         by the abuse department, bellsouth.net is blocked.  If you post
to  |
|         Usenet from these places, find another Usenet provider ASAP.    
   |
| Phil Howard KA9WGN (email for humans: first name in lower case at
ipal.net) |