TY - JOUR TI - Physics of liquid crystals AU - Michael J. Stephen AU - Joseph P. Straley PY - 1974 JO - Reviews of Modern Physics DO - 10.1103/revmodphys.46.617 UR - https://doi.org/10.1103/revmodphys.46.617 AB - This review discusses the physical properties of nematic, cholesteric, and smectic liquid crystals. Molecular theories of the liquid crystal phases are discussed and the molecular field theories of the phase transitions between the various liquid crystal phases are presented. The elastic theory and hydrodynamics of liquid crystals is developed. A wide variety of phenomena in liquid crystals, including elastic distortions, disclinations, flow properties, fluctuations, light scattering, wave propagation, nuclear magnetic resonance, effects of magnetic and electric fields, electrohydrodynamics, and optical properties, is discussed. ER -