Radio waves with wavelengths less than a meter are classified as microwaves.

Here's a breakdown:

* Radio waves: Electromagnetic radiation with wavelengths longer than infrared light. They are used for communication, broadcasting, and other applications.

* Microwaves: A portion of the radio wave spectrum with wavelengths ranging from 1 millimeter to 1 meter.

Examples of applications using microwaves:

* Cellular phones: Use microwaves for communication.

* Microwave ovens: Use microwaves to heat food.

* Satellite communication: Microwaves are used for transmitting data between satellites and ground stations.

* Radar: Microwaves are used to detect objects at long distances.

Note: The boundary between microwaves and radio waves isn't always strictly defined. The term "microwave" is often used for wavelengths shorter than about 30 cm, while longer wavelengths are considered radio waves.