Electromagnetic frequency refers to the rate at which electromagnetic waves oscillate or cycle. These waves are part of the electromagnetic spectrum, which includes various types of radiation such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Each type of radiation has a specific frequency, measured in hertz (Hz), which determines its properties and how it interacts with matter. The frequency of electromagnetic waves is inversely related to their wavelength; higher frequencies correspond to shorter wavelengths. For example, visible light has a frequency range of about 430 to 750 terahertz (THz), while radio waves can have frequencies as low as a few kilohertz (kHz). Understanding electromagnetic frequency is essential in fields like telecommunications, medicine, and astronomy.