Most people will go their entire life without ever knowing what the tiny holes in microwave doors actually do

How Microwave Ovens Actually Heat Your Food
Microwave ovens heat food using microwaves—a form of electromagnetic radiation with wavelengths typically in the 12.2 cm range, corresponding to a frequency of about 2.45 GHz. These microwaves cause water molecules in the food to vibrate, generating heat through friction.
Unlike conventional ovens, which heat food from the outside in, microwaves penetrate food and heat it more evenly. This method of heating is both faster and more energy-efficient, as it directly targets the water content in the food.
The Science Behind the Tiny Holes in the Door
The tiny holes in the microwave door are a critical part of a component known as a Faraday cage. This metal mesh acts as a shield that contains the microwaves within the oven, preventing them from escaping.

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