🚀 go-pugleaf

Snarfy writes, in a rather heated tone:

>And where does this field contain a magnetic component  other
>than  at the receiver or transmitter? If there's no current flow there's no
>amps and no magnetic field.

Seems to me that Snarfy should calm down and review Maxwell's equations.
Displacement current will produce a magnetic field, without the need
for current, as described by the equation

curl(H) - dD/dt = J, where the derivative of D is partial.

No electrons need move to make a magentic field. A time varying electric
field is sufficient.

As for:
> Heat cannot result at B until Amps can be detected at A.

True but heat will result at B after the current at A if B is spatially
separated from A. Even if the connection is a waveguide, you can't get
FTL information between A and B, even though the phase velocity exceeds c.

Get down with the facts,
ric@spd.hp.com