The Journal

All articles

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

Physics Fundamentals blog — long-form physics explainers, interactive labs and free calculators — What the blog covers, and where each topic starts.

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
Topic	What it covers	Browse
Electromagnetism	The 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 Mechanics	The physics of liquids and gases, at rest and in motion	/blog/category/fluids/
Kinematics	The branch of mechanics that describes motion	/blog/category/kinematics/
Classical Mechanics	The 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 Physics	What happens when the classical picture breaks down	/blog/category/modern-physics/
Nuclear Physics	The 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/
Thermodynamics	The physics of heat, temperature and energy transfer in systems made of enormous numbers of particles	/blog/category/thermodynamics/
Waves and Optics	Oscillations 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/