Summary
QUESTIONWhy don't the black plastic dishes used for ready meals melt when microwaved?
MICROWAVES are electromagnetic waves with wavelengths ranging from 1mm to 30cm or frequencies between 0.3 GHz and 300GHz which, like light waves or radio waves, occupy a part of the electromagnetic spectrum.See the full content of this document
Extract
Mystery of the Microwave ; Answers to Correspondents
They have several important practical applications such as relaying long-distance telephone sig...
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