About Gravity Lens Lab

Gravity Lens Lab is an original, free browser experiment for people who want to explore one part of black hole physics by doing rather than only reading. The central task is intentionally small: place a distant light source, select a normalized mass, trace a route toward an observer, and compare the result across repeated runs. No download, account, score, or prior physics course is required.

The model focuses on a non-rotating Schwarzschild black hole. It displays three useful landmarks in geometric units: the event horizon at 2M, photon sphere at 3M, and innermost stable circular orbit at 6M. A lightweight estimate, α ≈ 4M/b, provides a comparison value for light bending. It is useful for seeing how mass and an approximate impact parameter affect a result, but it is not a full integration of null geodesics.

The scene is designed as a teaching visualization. Normalized values and labeled boundaries provide the scientific structure. Glow, color, ray separation, line thickness, and background space art are enhanced so the relationships remain legible on desktop and mobile screens. The lab does not claim to model rotation, Kerr spacetime, accretion physics, telescope optics, time evolution, or research-grade predictions.

The interface, explanatory writing, Canvas overlays, experiment sequence, and visual composition were created for Gravity Lens Lab. The atmospheric concept image is used as an original production asset in this project. No external image library, font service, or content delivery network is required for the simulation itself; optional Google Analytics loads only after a visitor explicitly allows it.

The current public contact entry for project questions, accessibility observations, and reproducible bug reports is the maintainer’s public GitHub profile. When using an available public contact route, please describe the browser, screen size, action taken, expected behavior, and observed result without including personal information.

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