On Sat, 24 Sep 2011 19:31:34 -0400, Jamie
t wrote:

Jeff Liebermann wrote:
On Sat, 24 Sep 2011 10:32:29 -0400, Jamie
t wrote:


It was once absurd to think the world was round.
Jamie


The earth is not round. It's an oblate spheroid.

Like global warming is a lie? Because the sun
only heats one side at a time?

The ancients believed in a flat earth and didn't have any problems
with global warming. Obviously, the solution to global warming is to
flatten the planet.

I saw that some where.

Even if you don't believe the earth is an oblate spheroid, it's also
not "round". Just "round" is ambiguous and might imply a disk, as in
a flat earth. I suggest you use the term "sphere" instead of "round".

Jamie

The problem with the original article is that the author fails to
understand how a cavity magnetron operates. It's basically a whistle
operating at microwave frequencies. The physics of a whistle are not
trivial. The electron beam entering the cavity crosses the beam
exiting the cavity. The transition is unstable, causing the beam to
oscillate at a rate controlled by the circumference of the cavity.
Rather than accept the mechanical analogy, the author presents a
rather bizarre and faulty explanation, and then concludes that it must
be the result of some new and previously unknown principle. Methinks
not.


--
Jeff Liebermann
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