How is the speed of light, and path of travel, effected in time-space distorted (by say, gravity)? We know that the sun/earth's gravity distorts time-space. So when a photon travels from sun to earth....as it nears the earth.... how much length would the photon travel? Would it be slightly more than the "straight line" (or "un-distorted space-time") distance? Alternatively lets assume that if there were no gravity (i.e. assume that sun and earth were mass-less or very light).....and that the photon would travel the distance between the sun and earth in say exactly 8 mins now with gravity (sun and earth factored in with their actual masses) would the distance be slightly more due to space-time distortion? how much time would the photon now take?