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Shaw
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Has anyone done this calculation? It seems to me that if light and time disappear at the event horizon, it's a gravitation limit as well.
They don't, some popularised descriptions notwithstanding.Shaw said:It seems to me that if light and time disappear at the event horizon
You seem to be confusing fields with disturbances of fields (waves):Shaw said:It seems to me that if light and time disappear at the event horizon, it's a gravitation limit as well.
Thank you. That's reasonable. Do we have any information about what happens to time inside the black hole since gravitation and time are bound together. At the event horizon, time dilation can't increase since it shares the light limit velocity. If gravitation is calculated from the centre, and the max. velocity in gravitational space is c, we seem to have a void of gravitation and time from the centre to the event horizon.Dale said:No. In any sense that gravitation starts, it starts at the white hole's singularity. Or in a more realistic spacetime it starts with the material of the original star before it collapses or even forms in the first place
"time dilation" is never something that happens at a location.Shaw said:At the event horizon, time dilation can't increase
You've certainly picked up some very strange misconceptions about black holes!Shaw said:Thank you. That's reasonable. Do we have any information about what happens to time inside the black hole since gravitation and time are bound together. At the event horizon, time dilation can't increase since it shares the light limit velocity. If gravitation is calculated from the centre, and the max. velocity in gravitational space is c, we seem to have a void of gravitation and time from the centre to the event horizon.
Well, we don't have any experimental information, but we do have plenty of theoretical information. Clocks continue to function normally until they get close enough to the singularity that the tidal forces break it. Depending on the size of the black hole and the delicateness of the clock this can happen inside or outside the horizon. The only thing is that clocks inside the black hole cannot communicate outside, but they can continue to function.Shaw said:Do we have any information about what happens to time inside the black hole since gravitation and time are bound together.
The event horizon of a black hole is the boundary surrounding it beyond which nothing, not even light, can escape the gravitational pull of the black hole. It marks the point of no return; once an object crosses this threshold, it cannot escape the black hole's gravity.
Yes, gravity exists at the event horizon. In fact, the gravitational pull at the event horizon is extremely strong. The event horizon itself is not a physical surface but rather a mathematical boundary. The gravitational effects of the black hole are felt even before reaching the event horizon.
Near a black hole's event horizon, gravity becomes increasingly intense. As one approaches the event horizon, the gravitational force increases, leading to significant tidal forces that can stretch and compress objects. This phenomenon is known as "spaghettification," where objects are elongated in the direction of the black hole due to the differential gravitational forces.
Yes, we can observe the effects of gravity from outside the event horizon. The gravitational influence of a black hole affects nearby stars and gas, causing them to orbit around it. Additionally, the light from surrounding matter can be influenced by the black hole's gravity, leading to phenomena such as gravitational lensing.
Once an object crosses the event horizon, it cannot escape the gravitational pull of the black hole. From an outside observer's perspective, the object appears to slow down and fade away as it approaches the event horizon due to the extreme gravitational effects on time and light. However, from the perspective of the object itself, it continues to fall into the black hole without experiencing any sudden change at the event horizon.