Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: The cooperative pseudo- form of this phenomenon has been linked to the vibronic theory of ferroelectricity. A version of this phenomenon arising from mixing of two or more interacting states was studied by Opik and Pryce. The Ham factor is used to simplify calculations of electronic and vibronic properties affected by this phenomenon. It is frequently observed in complexes where the e-sub-g orbitals contain an odd number of electrons, as in compounds of copper(II). For 10 points, name this effect in which nonlinear systems in a degenerate electronic state distort to remove the degeneracy, which can result in the distortion of a coordination compound with octahedral symmetry to tetragonal geometry.
A:
Science