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In regard of frame-dragging within the ergosphere of a rotating black hole, what effect would this have on gravity?
It seems accepted that with frame dragging (or lense-thirring), the fabric of space is dragged around with the black hole but that light within the ergosphere still travels at c (though it could be said that in the direction of rotation, it's actually traveling faster relative to light outside the ergosphere due to the fact that the space it's traveling in is also moving). In relation to the attached picture, I'm under the impression that light has to travel further in line B than say line A (for a static black hole) as it is still traveling at c. My question is that based on the notion that gravity propagates at the at the speed of light, and that gravity (along with light) travels along geodesics, would gravity increase if it was to travel through line B compared to A or would the gravity acceleration be equal for both lines but stretched in line B? Would gravity still relate to the mass in a direct radial manner or would the gravity in effect be traveling the new distances created by the frame-dragging?
Any feedback welcome.
Steve
It seems accepted that with frame dragging (or lense-thirring), the fabric of space is dragged around with the black hole but that light within the ergosphere still travels at c (though it could be said that in the direction of rotation, it's actually traveling faster relative to light outside the ergosphere due to the fact that the space it's traveling in is also moving). In relation to the attached picture, I'm under the impression that light has to travel further in line B than say line A (for a static black hole) as it is still traveling at c. My question is that based on the notion that gravity propagates at the at the speed of light, and that gravity (along with light) travels along geodesics, would gravity increase if it was to travel through line B compared to A or would the gravity acceleration be equal for both lines but stretched in line B? Would gravity still relate to the mass in a direct radial manner or would the gravity in effect be traveling the new distances created by the frame-dragging?
Any feedback welcome.
Steve
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