Spacetime Curvature Well
The rubber-sheet analogy: mass curves spacetime, and light follows the curved geometry
Photon sphere 1.5 Rs
Event horizon 1.0 Rs
Accretion disk
Launch photons and watch curved spacetime bend their paths through the photon sphere, event horizon, and gravitational lensing
The rubber-sheet analogy: mass curves spacetime, and light follows the curved geometry