School Lab Planck Constant Apparatus

The Planck 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.

Compact, easy-to-use apparatus. 

Accurate results with less than 5% error. 

Measures Planck’s constant and estimates the work function of the cesium.