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I am Alexander Fufaev, physicist and owner of this website. Here you can find free, high-quality content about physics. Courses, exercises with solutions, questions and answers and much more!

Courses

A course is an ordered learning unit that will take you step by step through a comprehensive physics topic so that by the end you will have mastered it.

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Derivation

Magnetic Field Inside and Outside a Coaxial Cable

Derivation of the magnetic field (B-field) of a coaxial cable, inside and outside, by exploiting Ampere's law.

Derivation

Finite Potential Well: Wave Function and Energy

Derivation of allowed energies and associated wave functions inside and outside a one-dimensional finite potential box.

Question

What is the Elementary Charge?

Question

What is the Difference Between Electric and Magnetic Fields?

Derivation

Double-Slit Formula

Here we derive the double-slit formula, which you can use, for example, to find the wavelength of light using a double-slit experiment.