What Is a Microwave?

The microwave is a household appliance that raises food temperature using high-frequency electromagnetic waves. These rays produced by the magnetron inside the oven, called microwaves, are different from visible light (or radio waves) because they have a shorter wavelength. They have a frequency that is absorbed by water molecules in the food, which vibrates and generates heat.

Microwaves also cook food much faster than conventional ovens, which helps preserve nutrients. They use less energy, and don’t emit any fumes or other pollution. They heat only the food inside them, not the air, which makes them more energy efficient than traditional ovens, reducing their environmental footprint. Some people say that foods cooked in microwaves taste a bit “wet” or’soggy”, and they can sometimes cause cold or hot spots in the food. These problems can be solved by cutting the food into smaller pieces and ensuring that the edges of each piece are not touching, to avoid uneven heating.

Another concern about microwaves is the possibility of ingesting phthalates and BPA (bisphenol A and phenyl acetate), chemicals that can leach from plastics used to make microwave-safe food containers. These chemicals can disrupt hormones, and they’re thought to contribute to obesity in kids.

Microwaves are a convenient way to warm up leftovers or quickly prepare meals, especially if you’re short on time. They are easy to clean, and many models come with a Keep Warm setting that keeps your food warm for 60 minutes or longer.