Wave-particle duality, superposition & tunneling — the foundational behavior of matter and energy at the smallest scales, from double slits and orbitals to entanglement.
Send single quanta through a Mach–Zehnder interferometer and watch individual clicks build phase-dependent probabilities, then remove the second splitter to erase the interference.
Accumulate discrete detections on a screen and compare the histogram with the predicted diffraction envelope and fringes as you change wavelength, slit geometry and coherence.
Prepare a qubit on the Bloch sphere, precess its relative phase, and see why Z probabilities stay fixed while X and Y probabilities oscillate.
Send spin-½ atoms through sequential Stern–Gerlach analyzers and see why a repeated measurement repeats while a rotated one adds uncertainty.
Scatter an electron from a rectangular barrier and vary energy, height and width to see penetration, exponentially small transmission and above-barrier resonances.
Collect independent position measurements of hydrogen 1s and compare a movable radius gate with the exact radial probability.
Compare hydrogen 1s, 2pz and 3dz² signed-amplitude shapes, angular nodes and animated cross-sections with an adjustable density threshold.
Pick upper and lower hydrogen levels and read the transition energy, photon wavelength and frequency for emission or absorption.
Tune a probe across a Lorentzian gas line on a spectroscopy bench and compare incoming, absorbed and transmitted intensity in absorption and emission modes.
Rotate Alice and Bob polarization analyzers and watch joint correlations change while each local outcome stays 50:50.