Sandbox Physics

An open physics lab

Physics,in motion.

Change a parameter. Watch what happens.

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Nonspinning black hole. Bent light, gravitational redshift and Doppler beaming.

Open black-hole Lab

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DPC: Beam Deflection & Projected Fields

Oct 6, 2026

Where to begin?

All experiments 211

Mechanics

\frac{d\mathbf p}{dt}=\mathbf F

Waves & light

\frac{\partial^2\psi}{\partial t^2}=c^2\nabla^2\psi

115 experiments

Fields & matter

\mathbf F=-\nabla U

Quantum

i\hbar\frac{\partial\psi}{\partial t}=\hat H\psi