Critical Opalescence

Critical opalescence is a phenomenon which arises in the region of a continuous, or second-order, phase transition. Originally reported by Thomas Andrews in 1869 for the liquid-gas transition in carbon dioxide, many other examples have been discovered since. The phenomenon is most commonly demonstrated in binary fluid mixtures, such as methanol and cyclohexane. As the critical point is approached, the sizes of the gas and liquid region begin to fluctuate over increasingly large length scales. As the density fluctuations become of a size comparable to the wavelength of light, the light is scattered and causes the normally transparent liquid to appear cloudy.
Posts about Critical Opalescence
  • Dare to Be Stupid: A lesson for B2B marketers from Weird Al

    … for digital marketing, could it be true for your industry? Nice Try, Einstein Albert Einstein is widely seen as one of the most intelligent men to ever walk the earth. After all, the guy came up with an answer for the age-old question, “Why is the sky blue?” (Evidently because of critical opalescence and because Rayleigh scattering is quantitative, but I…

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