On 08/03/2021 17:24, williamwright wrote:
Is there any way of getting a clear view of the inside of a microwave
oven when it's working?

Bill
Over the years I accumulated quite a lot of dead compact fluorescent
lamps.

You discard the electronics.
You put at least 20 bulbs in a clear plastic bag.
You put the bag on the turn table.
You get a good idea of the energy distribution inside.
Some fun too :-)