A study on optical observation of electronic conduction phenomena in liquids

Investigating optically the process of conduction to breakdown in liquids, there is a question question how to precisely measure tiny bubbles whose size is smaller than the wavelength of light, because the behavior of tiny bubbles produced due to the movement of electrons perform an important role of breakdown criterion. Based on the fact that the light is a kind of electromagnetic wave, we have studied the problem by replacing a tiny bubble and light with a transparency tiny material and a mm electromagnetic wave, respectively, under the similarity law. And then, scattering and refraction of mm-wave due to a dielectric material have been investigated theoretically and experimentally together with 3-dimensional analysis based on geometric optics. From a series of these experiments, we succeeded to experimentally observe a new scattering character which could not be recognized by both Mie theory and geometric optics