Light and its nature have caused a lot of ink to flow during these last decades. Its dual behavior is partly explained by Double-slit experiment of Thomas Young - who represents the photon’s motion as a wave - and also by the Photoelectric effect in which the photon is considered as a particle. However, Einstein himself writes: "It seems as though we must use sometimes the one theory and sometimes the other, while at times we may use either. We are faced with a new kind of difficulty.
SALEH THEORY solves this ambiguity and this difficulty presenting a three-dimensional trajectory for the photon's motion and a new formula to calculate its energy.