This interpretation of the photoelectric effect restored the balance between the wave and particle models for light, and the position adopted today is that light has a wave. particle duality An important aspect of the treatment of the Compton effect is the conservation of the momentum of the colliding particles. But how can a photon, which has no mass, have momentun? Similarly, in writing the energy of the photon in equation(2)as hywe avoided any discussion of the form of thisThis interpretation of the photoelectric effect restored the balance between the wave and particle models for light, and the position adopted today is that light has a wave￾particle duality. An important aspect of the treatment of the Compton effect is the conservation of the momentum of the colliding particles. But how can a photon, which has no mass, have momentun? Similarly, in writing the energy of the photon in equation (2) as h we avoided any discussion of the form of this