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GRAVITATIONAL LENSING VISUALIZER
Black Hole Lensing Ray Lab
Trace light rays around a compact mass with Einstein-ring, photon-sphere and deflection diagnostics, ray ledger CSV, lensing SVG, Markdown brief and JSON receipt.
Reviewed 2026-06-29
EducationWeak-field deflection approximation alpha=4GM/(bc^2) in normalized unitsCaptured-ray and photon-sphere diagnostics3D ray bundle plus lensing projectionCSV/SVG/Markdown/receipt exports
WHY THIS BELONGS ON FASTTOOL
A visually serious tool should produce an artifact, not a paragraph.
This page creates a 3D scene, an inspectable projection, a ledger, a written proof brief and a receipt that humans and AI agents can compare.