Are microwaves safe?

The human body is about 70% water, and the principle of microwave heating is to make water molecules vibrate at high speed to generate heat. Therefore, direct exposure to high-intensity microwaves can cause internal tissues to heat up or even burn😱 Everyday use of a microwave is very safe thanks to two strict protective measures: Metal Shielding: The wavelength of microwaves is about 12 cm, while the holes in the metal mesh of the microwave oven's metal walls and glass door are only 1-2 mm. Because the wavelength is much longer than the holes, microwaves cannot penetrate and are trapped inside. Safety Interlock Switch: Multiple safety switches are installed inside. As soon as the oven door is opened, the power is instantly cut off, and the magnetron immediately stops emitting microwaves. It's impossible for it to be 'emitting while the door is open'. Precautions: If the microwave door is deformed, doesn't close properly, or the metal mesh is damaged, microwaves may leak. The eye's lens, being high in water content and lacking blood vessels for heat dissipation, is most susceptible to damage from microwave heating. Therefore, if you notice a damaged or improperly closing door, stop using it immediately and have it repaired or replaced. As long as the exterior is intact, a microwave oven is a very safe appliance.