This paper proposes a very compelling alternative model of the speed of light, which we call Apparent Source Theory ( AST ). AST can be stated in a few words: the speed of light is constant relative to the apparent source. AST starts with a simple question: what is the effect of slightly changing the position of the light source in the Michelson-Morley interferometer ? From optics, a very small fringe shift will occur. AST states that the effect of absolute motion of the MM interferometer is to create an apparent change in the position of the light source relative to the detector. Therefore, only a small fringe shift will occur in the MM interferometer due to apparent change of source position ( caused by absolute motion) for the same reason that only a small fringe shift will occur due to real/physical change of source position. This is the subtle trick of nature that eluded physicists for one hundred years. AST can easily explain many co-moving source and observer experiments, moving source experiments and moving observer experiments. AST also hints on the fundamental nature of light: light is not only a local phenomenon. Light is a dual phenomenon: local and non-local. The blunder in the conception of Michelson-Morley experiment was that they considered light as ordinary, material waves. The ether doesn't exist, but absolute motion does. This paper makes the distinction between the two. This paper reveals the fallacy in conventional and modern Michelson-Morley experiments.