Beyond the Equation.Experience Reality.
How did humanity understand the universe before the invention of symbols and formulas? We didn't memorize ink; we observed the pure mechanics of reality. PHYS.RUN bypasses centuries of abstract compression to resurrect the deterministic, interactive spacetimes where truth was born.
Trusted by students & researchers at leading institutions
The Problem
Static textbooks can't teach dynamic processes.
You watch a lecture on Convolution, nod along to the flip-and-slide animation, then someone asks “but why do you flip it?” and the understanding evaporates.
That's the Illusion of Competence — passive consumption masquerading as learning.
Real understanding requires you to interrogate the model. Drag a parameter. Break a system. Watch it rebuild. PHYS.RUN gives you the controls that textbooks never could.
Flagship Simulations
Don't read about it. Play with it.
Architecture
A rigorous abstraction for structured discovery
We don't scatter tools at random. Every simulation lives within a carefully designed three-tier knowledge hierarchy — from macroscopic domains down to the interactive atom.
The Knowledge Graph
Top-level abstraction of macroscopic knowledge domains. Whether it's Classical Mechanics, Calculus, or Linear Algebra — every discipline has a home. Atlases organize the scientific universe into navigable territories.
The Exploration Layer
Within each Atlas, Landscapes carve out focused sub-domains. A Landscape might house all of Trigonometry, or all of Wave Mechanics. They're the chapters of each knowledge domain — contextual environments for targeted exploration.
The Interactive Engine
The minimum playable unit. Each Lens is a real-time, GPU-accelerated simulation you can manipulate directly. Drag a parameter, break a system, watch it rebuild. No compilation, no setup — instant physical intuition.