Ice transparent to microwaves ?

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Phil Allison 12 years ago

** Seems it is true.

Microwaves heat water but NOT ice !!!

I just put a frozen bottle (plastic) of lemonade in the microwave - pushed "start" and the darn thing arced over at the horn outlet - just as it regularly does if no food is in the oven.

A little Googling tells me this is normal, you cannot heat ice ( or frozen drinks ) in a microwave.

The TRICK is to put the frozen bottle in warm water first, so it partly liquefies - THEN into the microwave for a couple of minutes - so the liquid water heats and melts the ice.

Who woulda thunk ?

.... Phil

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Lasse Langwadt Christensen 12 years ago

Den mandag den 20. januar 2014 08.24.04 UTC+1 skrev Phil Allison:

that is the reason for on-off cycling when using the microwave defrost on to heat the liquid water, off to let it melt ice

-Lasse

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Artem 12 years ago

All energy will be absorbed in outer layer. So outer layer will be burnout. Inner remain frozen.

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George Herold 12 years ago

Interesting thanks, Did you find any links better than this?

formatting link

George H.

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Artemus 12 years ago

Interesting. However, when I put a can of frozen OJ (minus the top lid) in my uwave for 60 sec, it thaws nicely with no arcing or problems at all. Art

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Tim Williams 12 years ago

OJ has a lot of electrolytes in it -- it doesn't fully freeze. After all, it's still kinda gooey. Kind of the consistency of... sitting on the toilet after a lot of... oh, never mind.

Tim

Seven Transistor Labs Electrical Engineering Consultation Website: http://seventransistorlabs.com

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Tim Williams 12 years ago

"John Larkin" wrote in message news: snipped-for-privacy@4ax.com...

And somewhere in the THz too, I think? At least, those pictures of women going through the airport scanners seem fairly opaque.

Water is weird. (Or should that be wierd?)

Tim

Seven Transistor Labs Electrical Engineering Consultation Website: http://seventransistorlabs.com

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Fred Abse 12 years ago

Circulating currents in the can might be kinda - interesting...

"Design is the reverse of analysis" (R.D. Middlebrook)

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Phil Hobbs 12 years ago

Just about everything is opaque at thermal wavelengths. That's why all those germanium and ZnSe lenses.

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net

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Artemus 12 years ago

The can tube is cardboard. Only the bottom end is metal. Art

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Phil Allison 12 years ago

"RobertMacy" Phil Allison

** The lemonade was an unopened, 1.25 litre bottle that had been in the freezer compartment part of a fridge overnight.

That the microwaves arced instantly is interesting, cos even a small amount of water ( or food ) prevents that happening.

So 1.25 litres of frozen (sugar free) lemonade absorbed practically no microwave energy.

... Phil

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RobertMacy 12 years ago

Everybody KNOWS it's i before e except after c What can I say? weird society.

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Lasse Langwadt Christensen 12 years ago

Den tirsdag den 21. januar 2014 01.00.02 UTC+1 skrev Robert Macy:

formatting link

-Lasse

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bloggs.fredbloggs.fred 12 years ago

People have the same problem trying to heat rocks in the microwave.

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George Herold 12 years ago

Well it is bipolar :^) (polar) It also has (almost) it's entire 'atomic' heat capacity (3kT per atom) as a liquid.

George H.

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krw 12 years ago

I've never been able to remember that one. ;-)

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dagmargoodboat 12 years ago

Like Brawndo. (The thirst mutilator.)

Cheers, James Arthur

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josephkk 12 years ago

defrost

lid)

at

Bwando, she no home.

?-)

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Michael A. Terrell 12 years ago

Reading posts made by BS? And then you need a LONG shower.

Anyone wanting to run for any political office in the US should have to have a DD214, and a honorable discharge.

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gregz 12 years ago

I think they used lava rocks when demonstrating the Heath microwave.

Greg

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Ice transparent to microwaves ?

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