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  • $\begingroup$ that is my question. why can not you see the ring of light? $\endgroup$ Commented Apr 12, 2019 at 14:02
  • $\begingroup$ no Rob. I think that you think that when I talk about the ring of light it's what the image shows. no no no ... I am talking about the ring of light that is created at a distance from Schwarzschild's radius, which is exactly 1.5 radii. to that ring of light I am referring to. $\endgroup$ Commented Apr 12, 2019 at 14:08
  • $\begingroup$ I remind you that what we are seeing is not the hole itself ... but its shadow amplified as a result of the distortion of space time. $\endgroup$ Commented Apr 12, 2019 at 14:09
  • $\begingroup$ @Pela a chance to include your diagram again. $\endgroup$
    – ProfRob
    Commented Apr 12, 2019 at 14:12
  • 2
    $\begingroup$ Closely related astronomy.stackexchange.com/questions/30317/… $\endgroup$
    – ProfRob
    Commented Apr 12, 2019 at 15:03