Re: is the magnetic field really moving?

On Thu, 31 Jul 2008 16:23:50 -0700 Salmon Egg <SalmonEgg@[EMAIL PROTECTED]
>
wrote:

| I just thought of another experiment or two. Make a solenoid wound on 
| cardboard tube many (10) times longer than its diameter. Tuck a battery 
| inside the tube to drive the solenoid. Cap the tube ends with 
| nonmagnetic thrust bearings. Sprinkle the iron filings on the caps to 
| map the lines of force.
| 
| Rotate the caps while keeping the tube stationary. The "lines" rotate. 
| Now keep the caps from rotating and rotate the main solenoid. Now, the 
| "lines" do not rotate with the solenoid.
| 
| Draw your own conclusions.

My conclusion is that the caps, on which there are the iron filings,
caused
the filings to rotate when the caps rotated, and caused the filings to not
rotate when the caps did not rotate.

The experiment needs to be sure no other forces, like mechanical, can be
involved.

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