I know light has wave particle duality, I understand these two points very well, 1. Light moves as a probability function, taking all the possible paths at once. The alternate paths cancel themselves out, resulting in a particle-like combined motion. 2. When relatively close to an edge, some paths will collide in the edge and their opposing pairs are thus not annihilated and continue at bent trajectories around the edge. What I really want to know is, are those bent trajectories actually possible? The gravitational pull of the earth is not enough for the photons to take up a bent trajectory like a rock thrown. So, how can we explain this bent trajectory?