Mounting plate with six colored light-emitting diodes with different emission wavelengths for determining Planck’s constant h by measuring the cut-off voltage as a function of the frequency of the emitted light. Light-emitting diodes with series resistors mounted on a base plate with a stem.
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for the Vibration Generator, 1000705 [U56005], Oscillations](/thumblibrary/U56005/U56005_01_140_140_Accessories-Chladni-Plate-circular-for-the-Vibration-Generator.jpg)
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