Well its a tuned cavity so I'd have thought the problem is both of leakage
of the output if you are near it, and the detuning of things if the door
mesh was removed. I don't know what lights are in them, one assumes they are
old fashioned filament lamps or they would be fried.
Same goes for an endoscope camera through a convenient holed made
somewhere.
Brian

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"williamwright" wrote in message
...
Is there any way of getting a clear view of the inside of a microwave oven
when it's working?

Bill