A notebook for the curious mind

Open Physics Notes

Understand the universe, one idea at a time.

Free physics notes, from the laws of motion to the frontiers of quantum theory. Follow the mathematics, explore the ideas, and keep asking why.

Chapters

Build your understanding, from fundamentals to frontiers.

  1. 01Newtonian mechanics
  2. 02Oscillations and waves
  3. 03Thermodynamics
  4. 04Electromagnetism
  5. 05Relativity
  6. 06Early quantum theory
  7. 07Quantum mechanics
  8. 08Quantum field theory
  9. 09Statistical physics
  10. 10Condensed matter physics
  11. 11Cosmology and astrophysics
  12. 12Frontiers of physics

Curiosities

Take a closer look at the questions still shaping physics.

  1. 01String theory
  2. 02Loop quantum gravity
  3. 03Black hole information paradox
  4. 04Dark matter
  5. 05Dark energy
  6. 06Navier–Stokes equations
  7. 07Differential geometry
  8. 08Groups, Lie algebras and gauge theory