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Rob[_8_] · April 20th 12, 07:35 PM posted to rec.radio.amateur.antenna

wrote:
Szczepan Bialek wrote:

What is the source of the heat in microwave oven?

Resistive loss.

No, I don't think so. A microwave works by agitating the water molecules
because they are dipoles that twist around in the electromagnetic field.
As an increased level of agitation is equivalent to higher temperature,
this immediately heats the water independent of resistive losses.
(which of cause will be a factor when attempting to heat stuff that has
no bipolar molecules and/or when using a resistive container to bake
rather than merely heat something)

[email protected] · April 20th 12, 07:54 PM posted to rec.radio.amateur.antenna

Rob wrote:
wrote:
Szczepan Bialek wrote:

What is the source of the heat in microwave oven?

Resistive loss.

No, I don't think so. A microwave works by agitating the water molecules
because they are dipoles that twist around in the electromagnetic field.
As an increased level of agitation is equivalent to higher temperature,
this immediately heats the water independent of resistive losses.
(which of cause will be a factor when attempting to heat stuff that has
no bipolar molecules and/or when using a resistive container to bake
rather than merely heat something)

Actually I meant to say dielectric loss; you are correct.

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