Physics, demystified · Updated daily

The universe,
written in equations.

A field guide to the principles that move planets, light, and thought itself. Read clear explanations, explore live simulations, and master the fundamentals — one law at a time.

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·F = m·a·E = mc²·PV = nRT·∇·E = ρ/ε₀·iℏ ∂ψ/∂t = Ĥψ·v = f·λ·ΔS ≥ 0·F = G·m₁m₂/r²·E = h·f·Δx·Δp ≥ ℏ/2·F = q(E + v×B)·T = 2π√(L/g)

The five pillars

Pick a domain and dive in. Each pillar links to lessons, formulas, and worked questions.

Motion, force, and the geometry of cause.

Classical Mechanics

Classical mechanics describes how matter moves under forces — from a falling apple to orbiting moons. It's the language of Newton's laws, energy, and momentum.

F = maOpen →
Patterns that move through everything.

Waves & Optics

v = f·λOpen →
Heat, entropy, and the arrow of time.

Thermodynamics

ΔS ≥ 0Open →
Charge, field, and the dance of light.

Electromagnetism

∇·E = ρ/ε₀Open →
Relativity, quanta, and the strange edges.

Modern Physics

E = mc²Open →
Interactive

Pendulum playground

Drag the bob, tune gravity, and watch energy oscillate between kinetic and potential — physics you can feel.

Launch sim →

Loved by students who hated physics

Real notes from learners using the site to revise, prep, and discover.

"
Finally got Maxwell's equations to click. The visuals do the heavy lifting.
Aanya · Year 12
"
Best physics revision site I've used — clean, fast, no fluff.
Marco · 1st-year EE
"
The pendulum sim made my essay on Galileo so much easier.
Priya · IB Diploma

Built to make studying enjoyable

Clarity first

Concepts are explained without jargon, then deepened with the math. Stop wherever you like.

Visual & interactive

Diagrams, animations, and 3D simulations make abstract ideas tangible.

Course-aligned

Topics mirror the structure of a university physics course — perfect for revision.

Ready to think like a physicist?

Start with mechanics — it's where every other branch begins.