You are mostly correct, but I'd like to agree that the rate food heats up does depend where it is. I know this intuitively, when the middle of my burrito is col

You are mostly correct, but I'd like to agree that the rate food heats up does depend where it is. I know this intuitively, when the middle of my burrito is cold when the rest is hot. Microwave ovens do not cook food evenly, and it's not just due to wave nodes. See: http://en.wikipedia.org/wiki/Dielectric_heating#Penetration http://en.wikipedia.org/wiki/Dielectric_heating#Penetration Part [0023] in particular: http://www.google.com/patents/EP1991813A2?cl=en http://www.google.com/patents/EP1991813A2?cl=en