Quote:
Originally Posted by bojan
They are suggesting that the radio signal, passing near BH will be circularly polarised as a consequence of passing near rotating BH ?
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Not necessarily, as I understand it. I've just been reading about it today from Nature's article on the same. As I understand it, if you measure the polarisation of the radio waves passing near the black hole, with multiple radiotelescopes simultaneously, the frame dragging will be evidenced by a change in polarisation of the light between the radiotelescopes at any given time.
So the polarisation of the light is changed by the frame dragging.
Al.