Finding Hot Spots In Your Microwave
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So you bought your microwave oven and you want to know how evenly it heats things. Why? Because nobody likes having to buy a rotating turntable or defrosting meat and finding it still partially frozen.
So how do you tell where the "hot spots" are? Simple: use styrofoam. A sheet of styrofoam cam be put on the bottom of the oven, and the oven run for a few seconds. It's best to start on low power and if you have a turntable take it out or turn it off. Look for where the styrofoam melts. If you want a more three-dimensional picture you can just raise the sheet of styrofoam by resting it on microwave-safe glass or ceramic.
If you don't like the idea of using styrofoam marshmallows (the small ones) are a perfectly good substitute, and you can eat them afterwards. Simply put a single layer of them on a plate.
You will not only know exactly where to place your coffee in the oven when re-heating, but also the wavelength the microwave uses -- that's twice the distance between hot spots.
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