Physics - Modern Physics - Nuclear Physics - Nuclear fission - Chain Reaction Simulator
Interactive fission simulation. Show a grid of U-235 nuclei (circles). Fire one neutron at a nucleus → it splits into 2 fragments + 2-3 neutrons + energy flash. Those neutrons hit other nuclei → more fissions → chain reaction! Controls: (1) Number of U-235 atoms in the grid (few = subcritical, many