If you hack a microwave so it works even with the door open, will it cook your brains?

Answer 1

not exactly, the way a microwave works its pretty necessary for the waves to be in an enclosed enviroment. If you open the door the microwave's effect is greatly diminished. You could put a plate of cheese in the microwave for over an hour and it would never melt

I should say though, do not underestimate the power of the microwave radiation. Although the heating effect is greatly diminished, it can still cause quite a bit of harm to a living being