Modern Physics
Wave-Particle Duality
Light and matter both behave as waves in some experiments and as particles in others, and learning to hold both…
Modern Physics
Classical Mechanics
Newton’s Law of Universal Gravitation
With one equation, Newton revealed that the force pulling an apple to the ground is the same force holding the…
Waves & Optics
Young’s Double-Slit Experiment
By shining light through two narrow slits and watching bright and dark bands appear, Thomas Young proved light is a…
Thermodynamics
Heat Transfer: Conduction, Convection and Radiation
Heat always flows from hot to cold, but it travels by three very different routes, and knowing which one is…
Electromagnetism
Electromagnetic Induction
Move a magnet near a coil and a voltage appears from nothing — this is the simple, profound trick behind…
Modern Physics
The Heisenberg Uncertainty Principle
Nature sets a hard limit on how precisely you can know a particle's position and momentum at once — not…
Kinematics
The SUVAT Equations
Five letters and four equations let you solve almost any problem of motion under constant acceleration — from a dropped…
Classical Mechanics
Centre of Mass
Every object behaves, for the purposes of motion, as if all its mass were squeezed into a single magic point…
Modern Physics
Radioactive Decay
Unstable atomic nuclei transform at random, yet vast collections of them obey a clockwork law precise enough to date the…
Classical Mechanics
Tension Force
A rope cannot push, only pull — and that single rule explains how ropes, cables and strings transmit force across…