how does the bending of light combined with the doppler effect and the aberration of light affect the appearance of an accretion disk close to a black hole?

Some spectral lines are excluded in the interior of the accretion disc as a result of the doppler effect and optical aberration. In the plane of view, the gas will undergo a strong doppler redshift since it is travelling at relativistic speeds in close proximity to the black hole.How does the Doppler effect work?Doppler Effect is the term used to describe the shift in wave frequency that occurs when a wave source and its observer move in relation to one another. Christian Johann Doppler made the discovery and defined it as the process of rising or falling starlight depending on the relative motion of the star.All sorts of waves, most notably water waves, sound waves, and light waves, have been seen to exhibit the Doppler effect.To know more about Doppler effect visit:https://brainly.com/question/15318474#SPJ4