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charlatan
Lv 7
charlatan asked in Consumer ElectronicsOther - Electronics · 6 years ago

why do glass ,ceramic,plastic etc. - when used in a microwave get heated,even though they are bone dry.excuse me if i am sounding naive.?

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  • spacemissing
    Lv 7
    6 years ago

    What the substance is (water, glass, or whatever) doesn't matter.

    If its atoms / molecules are resonant -- or nearly resonant --

    at the frequency of the microwaves, the item will heat up.

  • Anonymous
    6 years ago

    _Any_ dielectric (i.e. insulator) will get heated in a microwave, not just water. For details, see http://en.wikipedia.org/wiki/Dielectric_heating .

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