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[Physltest] [Phys-L] Re: fireball in the microwave



"....unionized air...." would that be Local 1293 Hot Gas Workers?
Sorry.



-----Original Message-----
From: Forum for Physics Educators [mailto:PHYS-L@list1.ucc.nau.edu] On
Behalf Of John Denker
Sent: Thursday, January 20, 2005 3:02 PM
To: PHYS-L@LISTS.NAU.EDU
Subject: Re: fireball in the microwave

Jon Greenberg asked:

If the "lightning" is a flame, something is burning. SO if it is
"detached form its source," what is burining in the detqached flame?
Or
is it not qa flame, but something else?

-- Burning isn't the key issue.
-- Flame isn't the key issue.
++ Plasma is the key issue.

Flame is one way of making a plasma, but not the only
way.

Once you've got some plasma, you can make more by feeding
energy into it.

Plasma absorbs microwaves, while unionized air does not.

Once you've got a big ball of plasma, being sustained by
feeding it microwave energy, it doesn't matter how things
got started.
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