Why do microwaves run at 2.4 GHz?

The ITM designated the 2.4 GHz band as an unlicensed spectrum specifically for microwave ovens. This band has three compelling properties: It doesn’t require much power to broadcast, it’s easy to contain, and at relatively lower power it can heat food . All this lowered the cost and barrier of entry for consumers.

The microwave spectrum is usually defined as a range of frequencies ranging from 1 GHz to over 100 GHz . This range has been divided into a number of frequency bands, each represented by a letter. There are a number of organizations that assign these letter bands.

Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 MHz and 300 GHz respectively.