Critical Opalescence

- Jan 08, 2020-

Critical opalescence

Near the critical point, the light beam irradiated to the medium will be strongly scattered by the medium. This phenomenon is called critical opalescence. Polish physicist Marian Smaurotus first showed in 1908 that the mechanism of critical opalescence is the fluctuation of medium density, and he did not give a related equation. Two years later, Einstein applied statistical mechanics to strictly discuss the density fluctuations formed by the molecular structure of the medium, thereby deriving the relevant equation, and using this equation to give another method for calculating the Avogadro constant, Interestingly, this mechanism of critical opalescence can explain the phenomenon of blue sky.