I have read this question:
This does not give a satisfactory answer.
Based on these answers, GWs should follow spacetime curvature just like EM waves.
Around a black hole, there is something called a photon sphere, where EM waves are in a stable orbit around the black hole.
A photon sphere or photon circle is an area or region of space where gravity is so strong that photons are forced to travel in orbits.
Could GWs be orbiting just like EM waves around a black hole?
Both GWs and EM waves do travel at the speed of light, so theoretically there could be a stable orbit.
- Are there GW spheres just like photon spheres around a black hole?