Thin films are the layer of substance having thickness from micrometers to nanometers. Thin films have a variety of application in the industry of Semiconductor technology. In addition, thin films have applications in optics, magnetism, mechanics and many other branches including chemistry.Free standing thin films of Liquid Crystal are important for industrial application, scientific research and modelling. Such films are drawn and held without any substrate. These films have remarkable response to temperature, electric and magnetic field etc. The thickness of thin films also plays an important role. This study includes the properties of Biphenyl E-7 thin film. In this study we measured thickness of free standing thin film of various sizes. We studied electro-optical properties by keeping the free standing thin film in electric field and measured the optical characteristics. We also studied the effect of temperature on thin film. Liquid crystals play important role in display devices. The performance of these display devices depend on the characteristics of liquid crystals such as anisotropy, dielectric constant, threshold voltage, etc. We also measure these physical quantities for Biphenyl E7 thin film.