Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
charlatan
Lv 7
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.?
2 Answers
Relevance
- spacemissingLv 76 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.
- Anonymous6 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 .
Still have questions? Get your answers by asking now.