<P> Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between 300 MHz (100 cm) and 300 GHz (0.1 cm). Different sources define different frequency ranges as microwaves; the above broad definition includes both UHF and EHF (millimeter wave) bands . A more common definition in radio engineering is the range between 1 and 100 GHz (300 and 3 mm). In all cases, microwaves include the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum . Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, K, K, or K band, or by similar NATO or EU designations . </P> <P> The prefix micro - in microwave is not meant to suggest a wavelength in the micrometer range . It indicates that microwaves are "small", compared to the radio waves used prior to microwave technology, in that they have shorter wavelengths . The boundaries between far infrared, terahertz radiation, microwaves, and ultra-high - frequency radio waves are fairly arbitrary and are used variously between different fields of study . </P>

Microwaves are an example of what type of energy