🔬 Michelson Interferometer Lab: Fringe Counting, White-Light Coherence, Gas-Cell Refractometer and Mirror Tilt (2D)

A virtual Michelson interferometer: move the mirror and count fringes, switch between laser, sodium doublet, LED and white light to see coherence length and visibility, tilt the mirror, and vent a gas cell to measure the refractive index of air or CO2.