The light is constant, which means it moves at the same speed in both cases (assuming the light is in a vacuum). It won&#x27;t move faster or slower based on the gravity field (other than in the case of black hole where it can&#x27;t escape at all).<p>What happens instead is that the speed that an object moves through space-time changes dependent upon gravity. Using an atomic clock, we&#x27;ve actually measured the effect of gravity to show that time moves more slowly down on earth than it does in an orbiting satellite.