Using the simplification of the experimental steps as a starting point,the photoelectric effect laboratory instrument is used to measure the refractive index and conductivity of liquids. Combined with the relationship between different physical properties of liquids,the magnitude of photocurrent in different concentrations of the same liquid is measured.With the help of Origin software,the equations of the calibration curves of photocurrent and liquid refractive index and conductivity were fitted. The refractive index and conductivity of the liquid can be calculated by substituting the magnitude of the measured photocurrent.
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