3 ms·
Does this mean that in earth's gravity well, there is an absolute difference in the time light takes to travel compared with light travelling in the void of sp
by platz 11y ago
Does this mean that in earth's gravity well, there is an absolute difference in the time light takes to travel compared with light travelling in the void of space?
Can we compute the strength of a static gravity field we are inside, by measuring the time that light takes to propagate through it?
- nikdaheratik 11y agoThe light is constant, which means it moves at the same speed in both cases (assuming the light is in a vacuum). It won't move faster or slower based on the gravity field (other than in the case of black hole where it can't escape at all). What happens instead is that the speed that an object moves through space-time changes dependent upon gravity. Using an atomic clock, we've actually measured the effect of gravity to show that time moves more slowly down on earth than it does in an orbiting satellite.
- deleted 11y ago[deleted]