The Research Of Plank Constant Measurement

The establishment of the basic physics constant and precise measurement play a mutual promoting role in the development of physics, especially the precision of measuring. The quantum's basic feature of Plank constant provides the new methods of expression and thinking about natural world to people .The view of quantum and the theory of relativity founded by Einstein have both molded the humanity's civilization of science technology in the 20th century.This paper introduces the meaning of physics constant measurement ,the important role which Plank constant plays in the development of physics ,photoelectric effect experiment and its law .The measurement of Plank constant by the photoelectric effect is analyzed theoretically the extrapolation method , the curvature method , the least square algorithm and the bohr theory are discussed and compared in constant. Different methods based on the analysis above and the research results in various fields are carefully analyzed. Also this article details the error causes produced by the measurement of Plank constant produced by the measurement of Plank constant using the counter-stopping yoltage in photoelectric effect. By the choices of optimization conclusion and elimination of the several currents influencing experiment of Plank constant by way of counter-stopping voltage are profoundly studies , which causes the experiment method to have been improved and experiment precision to have been become better.