Empirical fact that absolute zero cannot be reached in a finite number of thermodynamic operations: laser-cooling and adiabatic demagnetisation experiments asymptote without crossing 0 K. Direct experimental evidence for the third law.
Empirical fact that absolute zero cannot be reached in a finite number of thermodynamic operations: laser-cooling and adiabatic demagnetisation experiments asymptote without crossing 0 K. Direct experimental evidence for the third law.