HyperPhysics is a physics reference built by Carl Nave at Georgia State University. Instead of linear chapters, topics are connected as concept maps, so a reader can move from one idea to related ones in a few clicks.
Areas include mechanics, thermodynamics, electricity and magnetism, optics, sound, quantum physics, nuclear physics, relativity and astrophysics. Many pages combine a short explanation with the relevant equations and an embedded calculator that computes a result from entered values, for example for lens equations, fluid flow or radiation.
Old style site 😉 and no https, but valuable information … and fast loading
The site is free, needs no registration and is a quick way to refresh a physical principle or to find the governing formula with its variables defined. The pages are concise, so it works best as a reference and not as a full course.
