ELI5: How do microwaves heat food?

Imagine you're at a playground, and you're pushing your friend on a swing. To make them swing higher, you push them at just the right time.

A microwave is like a tiny playground inside a box. Instead of pushing swings, it uses microwaves – which are like invisible radio waves – to push tiny, tiny things called water molecules inside your food.

Here's how it works:

• Most foods, like your pizza or soup, have lots of water molecules.
• The microwave makes these invisible microwaves that bounce around inside the box.
• These microwaves are like your push on the swing. They push the water molecules back and forth, back and forth, really fast.
• When the water molecules move that fast, they bump into each other a lot.
• All that bumping creates friction, just like when you rub your hands together quickly to make them warm.
• This friction makes the water molecules get hotter.
• Because the water molecules are spread throughout the food, the whole food gets heated up from the inside out!

It's like a super-fast, invisible playground for water molecules inside your yummy food!