Frequency waves are also known as electromagnetic radiation or simply as waves. These waves are categorized by their frequency and wavelength. There are different types of frequency waves, such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays and gamma rays. Radio waves have the lowest frequency, while gamma rays have the highest frequency. Frequency waves are used in various fields such as telecommunications, electronics, medicine and astronomy. Synonyms for frequency waves include electromagnetic waves, radiation waves, and wave radiation.