Electromagnetic waves are a type of wave that have both a magnetic and electric field that an electron particle can travel through, hence the name! Electromagnetic waves are special because they do not require a medium like other types of waves and they can travel over very long distances. Electromagnetic waves are constructed in a way where the electric field and magnetic field are at right angles or perpendicular to each other. There are many types of electromagnetic waves such as radio waves, infrared waves, visible light, UV rays, x rays and gamma rays. Each of these waves has a varying amount of energy and a different wavelength. You can learn more about these waves by learning about the electromagnetic spectrum.