What is the term for the form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter?

The correct term for electromagnetic radiation with wavelengths ranging from about one meter to one millimeter is "Microwave." Microwaves fall within a specific range of the electromagnetic spectrum, typically defined as wavelengths from approximately one millimeter (1 mm) to one meter (1 m). This range lies between radio waves and infrared radiation, making microwaves significant in various applications, including communication technologies and microwave ovens.

In the broader context of electromagnetic spectrum classifications, microwaves are further subdivided into categories, such as ultra-high frequency (UHF) and super high frequency (SHF). These frequencies enable various technologies, such as radar and satellite communications, which rely on their ability to penetrate certain materials and transmit information over long distances effectively.