Making Method of the Data Processing System in the Experiment of the Planck Constant Measuring with Photoelectric Effect

The Planck constant is an important constant inmodern physics. Its experimental verification isgenerally by the experiment of photoelectric effect.The data processing is very complex. In order tosimplify the complex question the intelligent system“Measuring of the Planck constant withphotoelectric effect” had been developed withmultimedia authoring tool Multimedia ToolBook. Theexperimental data was of large number that obtainedby user after the leakage current between electrodesand the anode current had been compensated. Whenthe data had been filled the corresponding fields, theintelligent system could display dynamically thevolt-ampere curve and the speed displayed could beadjusted. Especially when the user only completed the3 or 4 filters experiments and the number of the clampvoltages was 3 or 4, the intelligent experimental dataprocessing system could display the slope of the fittingstraight line and the Planck constant. In laboratory itprovided five filters. The intelligent system used thetechnologies such as the statistics method of “Nonzero plus one”, “the least square method”,“rounding off”, “The uncertainty had a bit and itwas aligned as the last bit of the significant figure”.After the arbitrarily 3 or 4 values of the clamp voltageor all 5 values of the clamp voltage had been filled inthe fields, the slope of the fitting straight line could becalculated and be drawn, and the Planck constant andits uncertainty could be calculated and be displayed.The fitting straight line was the relationship betweenthe clamp voltages and the incident light frequencies.The Planck constant was obtained by multiplying theslope of the fitting straight line with the electroniccharge. These methods could be applied to developvarious intelligent experimental data processingsystems