Jose50
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Posts posted by Jose50
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You need to read up on "Frame Dragging".
The Kerr Metric (this is a vacuum solution to the Einstein Field Equations - ie General Relativity) described spacetime around a black hole with angular momentum - ie a spinning black hole. So yes a spinning black hole does "drag spacetime around"
It does not need to be spinning at the speed of light - in fact it cannot be as nothing which has mass moves through space at the speed of light - it just needs to be massive and be spinning. A central spinning mass will entrain the inertial frame such that it is affected by the central masses rotation; it is a gravitational effect - but that must also be seen as an acceleration effect of an inertial frame.
Here is Clifford Will's write up of the experimental proof of frame dragging - Gravity Probe B
I believe there is no frame-dragging effect of gravity on mass, only on electromagnetic energy!
Curiously, the Lense-Thirring effect in Gravity Probe B has the same value than the geodetic effect of the Earth around the Sun.
NASA error?
An interesting experiment!
Understanding Gravity Probe-B experiment without math
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Frame Dragging
in Modern and Theoretical Physics
Posted · Edited by Jose50
I believe there is no frame-dragging effect of gravity on mass, only on electromagnetic energy!
Curiously, the Lense-Thirring effect in Gravity Probe B has the same value than the geodetic effect of the Earth around the Sun.
Kinetic energy of a rotating body like Earth will increase gravity but more in the sense of classical force than classical aether!
An interesting experiment!
Understanding Gravity Probe-B experiment without math