According to Compton's own analysis, Compton scattering is an instantaneous collision between the photon of the incident gamma ray (or light) and the stationary electron where the photon has energy, the Planck constant multiplied by the frequency of light. In this article, I carry Compton's analysis farther to show it as much to be a collision in every cycle of the incident wave between the photon element and the moving electron, where the photon element has energy, the Planck constant per second. These two cases are shown to be substantially indistinguishable from each other owing to the relativistic effect. The photon element is then the true fundamental particle or the Planck element as it may be called for obvious reasons. The Planck element is likely to be the most fundamental... quantum of the electromagnetic field. This new analysis provides a possible resolution for the wave-particle duality of light.