雷雲內의 電荷分離 mechanism에 關한 硏究

An experiment study on the mechanism of electric charge separation in thunderclouds

It is known that frictional rubbing between different ice surfaces causes electric charge separation, and Yoshida(1944) reported the colder ice was positively electrified. The mechanism of charge electric separation in thunderclouds is considered to be related to the friction or impact between ice crystal particles. In order to explain the mechanism for the electric charge separation in thunderclouds, the experiment was conducted. The results from that experiment through rubbing asymmetrically the artifi챠ally provided ice rods are as follows: Asymmetric rubbing was charged with effect of the temperature difference by a theory of thermoelectricity, when the colder ice was positively charged and the warmer ice negatively charged. The average difference of charge between them was 0.35volt. Opaque ice rod with air bubbles was charged regardless of the effect of a theory of thermoelectricity. As the result of it, the cold ice rod was negatively charged and the effect of the friction was maximized by air bubbles. under a polarizing microscope, contact surface ice crystal cell was melted and frozen by the friction heat, and then was decreased in size. the charged volume was greatly increased at the colder range of -21℃~-16℃ and was irregularly developed at warmer temperature region. the cooling apparatus made for experiment can be used in measuring the frictional charge generation.