Chemical Physics2026-04-221 minarXiv:2604.20969expressLight Echo Flips ChemistryIn an empty hall, sound bounces between walls, turning into a booming echo. An optical cavity is the same echo chamber, just for light.Lukas Weber·Leonardo dos Anjos Cunha·Johannes Flick·Shiwei ZhangRobert HookeSerge HarocheRoy Glaubertotal internal reflectionoptical microscopyspectroscopyhydrogen👍👎☆SimplePopularAdvanced
