The Physics of Delta-C Mechanics: A Feynman Path Action Approach to Particle Dynamics - Paperbackby D. T. Froedge (Author) Delta c Mechanics is a field free particle based alternate approach to the physical interaction between mass and photons by way of the Feynman action path probabilities, offering a new approach to mechanical dynamics, and particle structure. It is based on the Feynman view of QED that photons going from one point to another follow all paths and there is a probability that the particles actually exist on those paths.