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Why does glass break in the microwave?

Updated: 8/11/2023
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12y ago

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Microwaves do not heat evenly. If one part of the glass object is heated more than others, and if the object had some kind of stress fracture (which may well be invisible to the naked eye) the expansion of the heated part may cause cracks to form, and break the object.

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Q: Why does glass break in the microwave?
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