The Journal

All articles

Every piece we've published, sorted by date. Each ends with worked problems and a FAQ.

What Is the Physics Fundamentals Blog?

The Physics Fundamentals blog is where each topic gets its long-form explanation: the idea first in plain language, then the mathematics, then worked examples — with an interactive lab and a calculator on the same page so you can test the result with your own numbers. Every article is fact-checked against standard references before it is published.

Where to start, by topic
TopicWhat it coversBrowse
ElectromagnetismThe physics of electric charge and magnetism, and of the fields that carry the force between them. It runs from the current in a wire to the light leaving a star, because visible light is itself an electromagnetic wave./blog/category/electromagnetism/
Fluid MechanicsThe physics of liquids and gases, at rest and in motion/blog/category/fluids/
KinematicsThe branch of mechanics that describes motion/blog/category/kinematics/
Classical MechanicsThe physics of why motion changes: the forces, energy and momentum that govern everything from a rolling ball to an orbiting satellite. Everything else in physics leans on it./blog/category/mechanics/
Modern PhysicsWhat happens when the classical picture breaks down/blog/category/modern-physics/
Nuclear PhysicsThe study of the nucleus: what holds it together, how it comes apart, and how much energy that releases. It is where a milligram of matter turns into the output of a power station./blog/category/nuclear-physics/
ThermodynamicsThe physics of heat, temperature and energy transfer in systems made of enormous numbers of particles/blog/category/thermodynamics/
Waves and OpticsOscillations that travel: sound and light, and what happens when a wave meets a boundary, a slit or a lens. The same mathematics describes a guitar string and a radio mast./blog/category/waves/