United Scientific Planck’S Constant Apparatus
€¢ Compact, easy-to-use apparatus
€¢ Accurate results with less than 5% error
€¢ Measures Planck€™s constant and estimates the work function of cesium
The Planck€™s Constant Apparatus is a compact unit containing an enclosed vacuum photocell with an attachment for illuminating light sources, a high stability power supply for applying a variable stopping voltage to the cell and a nanoammeter for measuring the resulting photocurrents.
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