Can microwave ovens leak microwaves? Is my mother’s warning not to stand in front of the microwave while it’s on valid?
A properly built and maintained microwave oven leaks so little microwave power that you needn’t worry about it. There are also inexpensive leakage testers available that you can use at home for a basic check, or for a more reliable and accurate check—as recommended by both the International Microwave Power Institute (IMPI) and the FDA—you can take your microwave oven to a service shop and have it checked with an FDA certified meter. It’s only if you have dropped the oven or injured its door in some way that you might have cause to worry about standing near it. If it were to leak microwaves, their main effect would be to heat your tissue, so you would feel the leakage.