An electromagnetic wave as vibrating electric and magnetic fields that move in space at light speed. Electromagnetic radiation is energy that is transferred through space from electromagnetic waves. Polarized light is light that passes through vibrating in only one way.Radio waves infrared rays and viable light ultraviolet rays x-rays and gamma rays all make the Electromagnetic spectrum. radio waves have the longest wavelength and help us listen to the radio and watch TV. infrared rays are used to see through objects or just detect heat in the militarily it helps see people we usually cant see in the dark or from long distance. visible light is light that people can see. z-rays are used to see through meat and see bones that could be broken or fractured. gamma rays have the highest frequency and shorter wavelength.