Maxwell has gathered various rules relating to electromagnetic theory is summarized by the equation presented in the form of math that Maxwell used to predict the changing electric. In other words, even if there are electromagnetic waves caused by induced continuously between the magnetic field and the magnetic field, electric and magnetic field moving out from the origin of electromagnetic waves move in ancient SV check box.Saduai speed equal to the speed of light, Maxwell's ideas that light is an electromagnetic wave with a frequency range of this prophecy was confirmed as true by the experiments of Hertz.