Quote:
Originally Posted by Disinfo Agent
The event horizon is not a region where the gravitational attraction equals the speed of light. If you think about it, that wouldn't even make sense: the gravitational pull is a force -- how could it equal a speed? The event horizon is also not a region where all infalling objects reach the speed of light; quite the contrary.
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oh.. well, I was under the assumption that the gravitational acceleration is the acceleration of an object caused by the force of gravity from another object and is measured in meters per second
http://en.wikipedia.org/wiki/Gravitational_acceleration
and i further assumed that in order to escape the gravitational pull, one would have to accelerate faster than the gravitational acceleration to escape the gravity well
isn't this called an "escape velocity"?
http://en.wikipedia.org/wiki/Escape_velocity
Quote:
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the escape velocity is the minimum speed an object without propulsion needs to attain in order to "escape" from gravity, i.e., so that gravity will never manage to pull it back
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and since light travels at the speed of light, then I was assuming that if light could not escape a gravitational field then the gravitational acceleration of that field must be equal to or exceed the speed of light. since we know that nothing can exceed the speed of light including gravity, then the escape velocity of an event horizon must be equal to the speed of light which would account for the fact that light cannot escape a black holes gravity well.
am i wrong?
I am just trying to really understand this