Mystery #2Tier 2waves / heat
How does a microwave heat your dinner without getting hot itself?
A microwave turns a cold bowl of soup piping hot in barely a minute, yet the oven walls stay cool enough to touch. There is no flame, no glowing red element, no heat you can see anywhere. So what on earth is doing the cooking?
Your guess
What's your best guess: what actually heats the food inside a microwave?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.