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7 votes
3 answers
4k views

What do we mean when we say gravitational waves are non-linear and do not superpose like EM waves?

I have read this question: Now it's not actually true that general relativity obeys a law of superposition, but it is an extremely good approximation for a small-amplitude gravitational wave passing ...
Árpád Szendrei's user avatar
72 votes
7 answers
11k views

Does gravity bend gravity?

Let's say that there is a large mass $M$ a light-year or so away from a black hole merger, which causes a very large gravitational wave to be produced. When the gravitational wave reaches $M$, does it ...
Tachyon's user avatar
  • 2,042
10 votes
3 answers
1k views

Warp drive with gravitational waves in the nonlinear regime

gravitational waves are strictly transversal (in the linear regime at least), also their amplitudes are tiny even for cosmic scale events like supernovas or binary black holes (at least far away, ...
lurscher's user avatar
  • 14.7k