In order to keep the speed of the l

In order to keep the speed of the light source permanently during the propagation of light, the kinetic energy lost during the propagation of light depends on the light wave to provide photons. In this way, the first is to reduce the frequency of high-energy waves and make the wavelength longer; on the whole, most of the gamma rays and Ex rays will shortly leave the point light source, due to the continuous supply of kinetic energy to the photons, which will be converted into other Electromagnetic spectrum of frequency and wavelength, and will continue to provide kinetic energy to photons.