Laser and GR

  • Thread starter jaiii
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  • #1
jaiii
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How to change the curvature of space-time around a very powerful laser beam?
 

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  • #2
Dale
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Look up pp-wave spacetimes, particularly the axisymmetric pp-wave spacetimes.
 
  • #4
jaiii
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Spinning disk

Thank you for your reply but I have another question
How lame space time around a rotating metal disk?

Thank you.
 
  • #5
Dale
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Huh? What is a lame spacetime?
 
  • #6
jaiii
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"lame" I mean curvature of spacetime.

I am sorry but this text translate Google from Slovak languige.
 
  • #7
tiny-tim
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Hi jaiii ! :smile:

Any rotating object "drags" spacetime around with it …

see http://en.wikipedia.org/wiki/Frame-dragging" [Broken] :wink:

btw, "lame" means unable to walk properly ("he is lame", "he has a lame leg" "lame-duck president"), and also is used figuratively to mean something that doesn't work properly ("a lame excuse") :smile:
 
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  • #8
Dale
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In addition to the information about how a rotating mass affects the curvature of spacetime you may want to read about how using rotating coordinates affects things in the absence of a rotating mass:

http://www.phys.uu.nl/igg/dieks/rotation.pdf [Broken]
 
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