Physics is learned by doing it.
doPhysics is one place with two halves. In Understand you learn every concept by doing it, free. In Challenge you test that understanding on problems chosen by a teacher, all the way up to JEE Advanced level.
Made in India, for students anywhere
doPhysics was built by Asheshanand Acharya, a physics teacher in India who has spent decades in classrooms with students preparing for the hardest school-level physics examination there is, the JEE Advanced. In 2026 IIT Madras honoured him with its First Principles Teachers Award. The whole of doPhysics, every explanation, figure and problem, carries that classroom experience.
Physics is the same in every country. The syllabus here is the physics of the last two years of school, whatever your board calls it: mechanics, waves, thermal physics, electricity and magnetism, optics and modern physics, with the mathematical tools you need built in. It is written in plain English, in SI units, for a student who may be studying without a physics teacher at hand.
Understand: every concept is something you do
The Understand section is a complete physics book, and it is free. Each idea is short. Its figure moves when you press play or drag it, so you watch the physics happen rather than read about it. A quick check follows each idea, and the feedback names the mistake, not just the answer. Your notebook, your error journal and your progress follow you from phone to laptop once you sign in.
Challenge: problems worth your time
The Challenge section holds more than a thousand problems across every branch of the syllabus, each one vetted by the teacher himself. Every problem comes with a hint, a method to follow and a full solution, so a wrong attempt teaches as much as a right one. The first problems are free without an account; a subscription opens all of them, with a 7-day full refund if it is not for you.
Two people, one standard
doPhysics is built and run by two people: Asheshanand Acharya, who writes and checks the physics, and Ankit Shukla, who builds the platform. Nothing reaches a student until it has cleared the teacher's bar for clarity and correctness. If you find an error, we want to hear about it, and we fix it.
Right now, which one?