What Really Happens Inside a Microwave?

No flame. No glowing coil. So how does your food get hot? We follow one microwave from the magnetron that "whistles" it out, through a metal tunnel and a box full of bouncing waves, into your food, where it makes water twist back and forth 2.45 billion times a second. Plus: why the door has tiny holes, why food heats unevenly, and why forks spark. 0:00 90 seconds to hot food 0:28 The five stops 0:40 How it was invented 1:20 Stop 1: The magnetron 2:05 Stop 2: The waveguide 2:34 Stop 3: The metal box (hot spots) 3:26 Stop 4: The food (and two myths) 4:40 Stop 5: The door 5:22 Why metal sparks 5:53 Recap #microwave #howitworks #science #physics #kitchen