Original: Electromagnetic radiation is classified into several types according to the frequency of its wave ; these types include ( in order of increasing frequency and decreasing wavelength ) : radio waves , microwaves , terahertz radiation , infrared radiation , visible light , ultraviolet radiation , X-rays and gamma rays .
Simplified: Electromagnetic radiation is classified into types according to the frequency of the wave : these types include , in order of increasing frequency , radio waves , microwaves , terahertz radiation , infrared radiation , visible light , ultraviolet radiation , X-rays and gamma rays .