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May the Physics be with You!

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!
Physics 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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Level 2 (suitable for students)

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.