Relativity Lab
Dilation & Doppler. This multi-solver chains 2 solvers into a single guided workflow — run each step in order and carry the result forward.
Controls
Presets
Near the speed of light, space and time warp. The Lorentz factor γ = 1/√(1−v²/c²) governs it all: moving clocks run slow by γ (time dilation), moving objects shrink along their motion by 1/γ (length contraction), and energy grows without bound. At everyday speeds γ ≈ 1, so we never notice.
Data Inspector
Governing equation
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
Controls
A moving source squeezes its wavefronts ahead and stretches them behind — higher pitch approaching, lower pitch receding. Push past the wave speed for a sonic boom.
Presets
Data Inspector
Governing equation
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
We build custom solvers and workflows for labs, firms, agencies, and courses — your parameters, your branding, your data.
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Frequently asked questions
- What is the Relativity Lab multi-solver?
- Relativity Lab is a guided workflow that chains 2 individual PolySim solvers into one end-to-end analysis, piping each result into the next step.
- Is it free to use?
- Yes. Every step runs entirely in your browser using real numerics — no install, no account, no cloud cost. Custom or private solver packs are available as a paid service.