<Marianne Hu <email@example.com> wrote:
<Bess, Ellen et al,
<I once read that it's not advisable to microwave milk in the
<microwave. Something about retaining some radioactivity!? Has
<anyone else heard anything about this?
There are no radioactive substances ie uranium/plutonium used in
microwaves. Just look at the back of your microwave. Federal law
requires the yellow and black radiation sticker to be applied.
Microwaves are electrical currents pulsed at a different frequency
than house current. Electricity moving through a wire 'radiates'
energy in a circular pattern around the wire.
The microwave energy is transformed in the food/milk into heat energy.
So yes - all foods retain the radiated energy in the form of heat.