Backscattering of light at a black hole

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SUMMARY

The discussion centers on the phenomenon of light backscattering when a laser beam is directed at a black hole. It is established that light can loop around a black hole multiple times before returning to the observer, which allows for the potential detection of black holes. The conversation explores whether this effect is due to diffraction or quantum mechanical principles. The feasibility of using this method for black hole detection remains uncertain.

PREREQUISITES
  • Understanding of general relativity and black hole physics
  • Familiarity with laser technology and light propagation
  • Knowledge of diffraction and quantum mechanics
  • Basic principles of gravitational lensing
NEXT STEPS
  • Research gravitational lensing and its applications in astrophysics
  • Study the effects of light in strong gravitational fields
  • Explore quantum mechanics related to light behavior near massive objects
  • Investigate current methods for black hole detection and their effectiveness
USEFUL FOR

Astronomers, astrophysicists, and students interested in black hole research and the interaction of light with gravitational fields will benefit from this discussion.

MasterD
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In my book it states that if you shine a laser beam on a black hole some of the light is backscattered; so that way you can detect black holes; why is that?

Is it because of diffraction or is it because of quantum mechanical effects?
 
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MasterD said:
In my book it states that if you shine a laser beam on a black hole some of the light is backscattered; so that way you can detect black holes; why is that?

Is it because of diffraction or is it because of quantum mechanical effects?

What book?

If you send light in just the right direction, it will loop once around the black hole and come back to your eye/detector. If you send light in just the right direction, it will loop twice around the black hole and come back to your eye/detector. If you send light in just the right direction, it will loop three times around the black hole and come back to your eye/detector. ...

I'm not sure about the feasibility of using this as a method for detecting black holes.
 

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