🌀 Rotational-Vibrational Spectrum: P & R Branches (2D)

Watch a spinning, vibrating diatomic molecule (HCl, CO, HF or HBr) absorb infrared light and write its P and R branch spectrum. Change temperature, isotope mix, anharmonicity and vibration-rotation coupling, click any line and see the exact J to J' transition on the molecule and the energy ladder.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install