PhD in Astrophysics, supervisor George F.R. Ellis, worked in relativity, cosmology, and alternative theories of gravity for 30 years, been at Bishop's University for 16 years, currently full professor in the Physics & Astronomy Department. Author of 210 refereed journal articles and 7 books, funded by NSERC and volunteered extensively for NSERC, the Canadian Association of Physicists, and occasionally for other organizations worldwide.
It has always bugged me that the illustrations of"mass bending space" to explain gravity actually use the normally understood effects of gravity for that illustration. It always looks like a bowling ball hanging in an elastic fish net. And we are supposed to envision something like a ball bearing rolling around that depression because gravity is pulling it"down" into the"gravity well".
Worse, when trying to explain how light cannot escape the event horizon of a black hole, the popular media illustration shows light being swept into the hole by space flowing into the hole faster than the speed of light. But, then theorists argue that space does not really flow at all, it just bends and warps. And that really pulls the rational rug out from under that depiction of light not being able to go"upstream" fast enough to get out of a black hole's event horizon.
Even worse, it you ask whether a photon acts like a particle or a wave at the event horizon, you tend to get a different conceptual image. If it is a particle, then it would lose energy as it traveledthe event horizon, but would not get to zero energy until it got to infinite distance - the effect would be increasing red shift as a function of distance above the event horizon.
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