How Do Black Holes Exert Gravitational Force If They Capture Gravitons?

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Discussion Overview

The discussion revolves around the nature of gravitational force exerted by black holes in the context of gravitons, particularly focusing on how black holes might influence gravity if they capture gravitons, which are proposed to be the mediators of gravitational force in some theories.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions how black holes can exert gravitational influence if gravity is mediated by gravitons, suggesting that black holes would capture gravitons similarly to how they capture photons.
  • Another participant clarifies that in theories involving gravitons, these are considered virtual particles, which can exceed the speed of light and may escape from within the event horizon of a black hole.
  • A different viewpoint is presented regarding the perception of time for an outside observer, suggesting that black holes never fully form from their perspective, and the gravitational influence observed is due to the collapsing object rather than the black hole itself.
  • A participant references a Relativity FAQ that addresses the relationship between black holes and gravity, indicating that there are existing resources on the topic.

Areas of Agreement / Disagreement

Participants express differing views on the mechanics of gravity in relation to black holes and gravitons, with no consensus reached on how these concepts interact.

Contextual Notes

The discussion includes assumptions about the nature of virtual particles and their behavior near black holes, as well as the implications of time dilation effects as perceived by outside observers. These aspects remain unresolved and are subject to interpretation.

poiboy
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If gravity is "enabled" (for lack of a better word) through the gravitron, how could black holes have a gravitational influence? Wouldn't the black hole suck the gravitron back in, as it would with the photon? Thanks for any replies.
 
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In theories where gravity is due to exchange of gravitons, these gravitons are virtual particles, are virtual gravitons. Virtual particles can exceed the velocity of light, so can escape from inside the event horizon of a BH. Virtual photons can escape from inside the event horizon as well
 
Black holes (resulting from something collapsing) never quite make it, as far as an outside observer (o.o.) can tell. This comes about because time at the black hole appears to the o.o. to slow down to a crawl. Another way of looking at it is that the black hole takes forever to form. The gravity (gravitons?) that is exerted is simply that of the object about to become a black hole, but never getting there.
 
Originally posted by poiboy
If gravity is "enabled" (for lack of a better word) through the gravitron, how could black holes have a gravitational influence? Wouldn't the black hole suck the gravitron back in, as it would with the photon? Thanks for any replies.

There is a Relativity FAQ on this exact topic. Please see
http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/black_gravity.html
 

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