Re: is the magnetic field really moving?

In article 
<fd598ce8-9d2e-41fa-ab0f-cad8ab98335a@[EMAIL PROTECTED]
>,
 Benj <bjacoby@[EMAIL PROTECTED]
> wrote:

> In Faraday Generator, if the magnet is stationary and the disk rotates
> you get an output.
> Theory: Charges in moving disk move relative to fixed magnetic field
> producing voltage. Connecting wires do not move with respect to magnet
> so no induction there. You see a voltage output.

With my new understanding, I realize that a conductive disk is not 
necessary. The conduction just makes measurement easier. At any point on 
a rotating insulating disk, there will still be an E field generated by 
the motion even though no current flows. The E field is a consequence of 
special relativity.

The electric field will lead to polarization of real atoms and 
molecules. I would expect it to be very difficult to measure that field 
using the Stark effect or anything similar.

Bill