General relativity · Exact kernel
Photon sphere
r = 1.5 r_s
Photon sphere
- r_s = 2M
- 2.00000
- r_ph = 3M
- 3.00000
- units
- Geometric (G=c=1). For kg use Schwarzschild-radius tool.
Closed-form or algebraic kernel. Throws rather than inventing a value. Not a substitute for your derivation. FrameCalc is an educational workbench. It is not for medical, nuclear-safety, radiation-protection, or engineering sign-off. Fusion and IEC estimates are models, not device predictions. Accuracy · Legal