25 °C. Extraordinary ray (e)
J. Li, C. H. Wen, S. Gauza, R. Lu and S. T. Wu. Refractive indices of liquid crystals for display applications, J. Disp. Technol. 1, 51-61, 2005
Liquid crystal (LC) is a state of matter that have properties between those of a conventional liquid and those of a solid crystal.