According to Einstein's theory of general relativity, photons cannot orbit around large masses. This is because photons have no mass and therefore cannot be affected by the gravitational force of the large mass.
Einstein's theory of general relativity explains the behavior of photons around large masses by describing how gravity curves the fabric of space-time. This curvature causes the path of photons to appear to bend as they travel near a large mass, but they are not actually orbiting the mass.
Yes, there is strong evidence supporting Einstein's theory. For example, the bending of starlight observed during a solar eclipse in 1919 was a crucial piece of evidence that confirmed the predictions of general relativity.
No, Newton's theory of gravity does not accurately explain the behavior of photons around large masses. This theory assumes that gravity is a force acting between masses, but general relativity shows that gravity is a result of the curvature of space-time.
Gravitational lensing is a phenomenon where the path of light is bent by the gravitational force of a massive object. This is often observed as a distortion or magnification of distant objects. However, this is not the same as photons orbiting around large masses as described by Einstein's theory. The bending of light in gravitational lensing is due to the curvature of space-time, not the gravitational pull of the object itself.