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Ｌａｂｏｒａｔｏｒｙ オッシーが大学時代に使ったラボでの実験機材や、ペーパーなど。

（These photos were taken by Jennifer.） Counting Statistics Experiment Photoelectric Effect Experiment Chaos in the Diode Circuit Experiment Thermionic Emission of Electrons Experiment Franc-Hertz Experiment

 The Counting Statistics Experiment to count gamma particle from nature and Cessium-137 source Nobuyuki O.Physics Undergraduate Student, Northern Arizona University in Flagstaff, AZ(Received 11 March 2004)I counted the radiation decay in nature and from Cs-137 using the Geiger-Mueller tube, which can detect the gamma particle. From those data, I used Poisson distribution to determine the theoretical distribution. Then, I plotted as a histogram of experimental and theoretical distribution. The second part of this experiment, I used normal distribution with theoretical distribution. The reason to use normal distribution was the number of counting was too much and I put the data in groups called bins. Then, I integrated over the bin size. This normal distribution was good for integration. Finally, I tested using chi-square test to determine the fitness of theoretical value and experimental value. Then to determine the validity of fit, I used the chi-square-test tables. The result was 0.94 for the low counting and 0.99 for high counting. The Photoelectric Effect Experiment to Calculate the Planck’s constant Using the Mercury and Helium tube Nobuyuki O. Physics Undergraduate Student, Northern Arizona University in Flagstaff, AZ (Received 20 April 2004) The photoelectric effect experiment is to confirm the particle theory of light . When light hit the metal, electrons are given off from the metal. However, all light does not related to the electrons emission. Only light that have a certain amount of energy can help electrons to be emitted from the metal. This energy is known as the work function. From the plot of all the data which was photoelectric current and the applied voltage, the work function was determined, which was 1.71 V in this experiment. From this work function, the Planck’s constant, which was , was also calculated. This value was 1.21 % error with respect to the accepted value. Thermionic Emission of Electrons Franc-Hertz Experiment Chaos in the Diode Circuit The Michelson Interferometer Experiment

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