Sandbox Physics

Physics,in motion.

Change a parameter. Watch what happens.

Explore the labs

A nonspinning black hole model with bent light, gravitational redshift and Doppler beaming.

Open black-hole Lab

2026 Nobel Prize in Physics

An invisible particle. A new view of the universe.

Meet Francis Halzen, IceCube and the worldwide effort to understand neutrinos. Read the stories, then try the experiments.

Explore the Nobel feature

Just addedNov 13, 2026

Black Hole Superradiance and Boson Clouds

How can a spinning black hole amplify a wave and grow a cloud of light particles?

Where to begin?

All experiments 749

Mechanics

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

183 experiments

Waves & light

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

191 experiments

Fields & matter

\mathbf F=-\nabla U

192 experiments

Quantum

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

183 experiments