Interactive browser demos for modern physics topics. Drag the sliders, change the inputs, and watch the math respond.
Shine light on a metal cathode, tune the frequency and intensity, switch between materials from cesium to gold, and read off the stopping voltage on the I–V curve.
Explore how momentum and center-of-mass motion behave at speeds approaching the speed of light, where Newtonian intuition breaks down.
Alice and Bob duel inside a ship moving at 0.995 c. In the ship's frame both get hit by the flash at once — but Eve on Earth disagrees. Watch the same events unfold in two frames.
Stefan–Boltzmann, Wien's displacement law, and Planck's blackbody curve. Push the temperature slider and watch a rock glow red-hot to blue-white. See why the classical Rayleigh–Jeans curve blew up and forced Planck to invent quanta.
A rocket flies past at 0.6 c and shoots a ball forward at 0.8 c. You don't see the ball at 1.4 c — you see it at 0.946 c. Four animated cases show how velocities really add (and subtract) at relativistic speeds.
OpenStax Ch. 28, 29 & 30 plus §13.1, §14.7, §27.3 plus instructor materials: special relativity, thermal radiation, photoelectric effect, double-slit interference, matter waves & Heisenberg uncertainty, the Bohr atom & quantum numbers, the Pauli exclusion principle & periodic table, lasers, semiconductors & band theory, nuclear binding, decay, fission and fusion. All 19 lectures plus both midterms and final-exam review.
Complete study guide covering Giancoli chapters 16–25: electrostatics, circuits, magnetism, EM induction, Maxwell's equations, waves, optics, and instruments. All 19 lectures plus midterm/final reviews.
OpenStax College Physics 2e Ch. 1–12: units & dimensions, 1-D and 2-D kinematics, vectors, Newton's laws, friction & inclines, circular motion, gravity, work & energy, momentum & collisions, torque & static equilibrium, rotational motion, angular momentum, fluid statics (Archimedes), Bernoulli, and viscous flow (Poiseuille). All 19 lectures plus both midterms and final review.