Originally Posted by **Farsight** See what Mike said, and see LIGO: *"When large masses move suddenly, some of this space-time curvature ripples outward, spreading in much the way ripples do the surface of an agitated pond...* Laser light enters the arms through a beam splitter located at the corner of the L, dividing the light between the arms. The light is allowed to bounce between the mirrors repeatedly before it returns to the beam splitter. If the two arms have identical lengths..."
Amazingly enough, when the gravitational waves pass through, the arms change length. Because *space waves*. So what are gravitational waves made of? The same as a gravitational field: space. I don't know why this isn't in the textbooks, particularly since Einstein described a field as a state of space. |

I am interested on how the logical thinking works on measuring the space-time curvature ripples to identify gravity wave.

Gravity wave [A] can generate the space-time curvature ripples [B]

A = B, but B is not necessary equal to A

if anyone find occurrence of space-time curvature ripples, then it is possible that Gravity wave is existed, but this ripples could be caused by other factors, so finding Gravity wave by measuring space-time curvature ripples seems again logical thinking, except if they can prove that the occurrence of space-time curvature ripples must exist with gravity wave in the first place. In other words, if someone finds the occurrence of space-time curvature ripples, how can he proves that come from Gravity wave?

Furthermore, does anyone know the minimum requirement on space-time curvature ripples? My body gets weight (mass), when I walk along the street, I should create a bit space-time curvature ripples, do I?

Does anyone have any suggestions?

Thanks, to everyone very much for any suggestions :>