Could Gravity Transport Energy?

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Discussion Overview

The discussion revolves around the concept of whether gravitational fields can transport energy and the implications of this for gravitational waves. Participants explore theoretical aspects and potential experimental confirmations related to gravitational waves and their energy characteristics.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that gravitational fields carry energy and are a source for their own existence, linking this to the concept of gravitational waves.
  • Another participant agrees with the idea that gravitational waves could potentially be converted back into energy.
  • A different participant questions the experimental confirmation of gravitational waves, noting that they have not been directly detected yet.
  • In response, another participant points out that while direct detection has not occurred, evidence from the decay rate of the binary pulsar PSR B1913+16 supports the existence of gravitational waves, referencing the Nobel prize awarded for this work.

Areas of Agreement / Disagreement

Participants express differing views on the confirmation of gravitational waves, with some asserting their existence based on indirect evidence while others highlight the lack of direct detection. The discussion remains unresolved regarding the implications of gravitational fields transporting energy.

Contextual Notes

There are limitations related to the definitions of energy transport in gravitational fields and the conditions under which gravitational waves might be converted back into usable energy. The discussion also reflects uncertainty regarding the experimental status of gravitational waves.

TheEtherWind
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I've heard that gravitational fields carry energy themselves, and are therefore a source for their own existence. I take this as a "pre-requisite" of a sort for gravitational waves. If I were to shoot a high energy laser in space and cause a rippling effect of space-time. Could somebody, somewhere else, convert gravitational waves back into energy?
 
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In a word, yes.
 
If I remember correctly, gravitational waves have yet to be confirmed to exist by experiment?
 
They haven't been detected directly, but analysis of the decay rate of the binary pulsar PSR B1913+16 indicates that it is losing energy at a rate that can be explained by gravitational wave emission. This work was worth the 1993 Nobel prize in physics.
 

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