Misura della costante h/e (costante di Planck/carica elementare) mediante diodi L.E.D.

By means of some LEDs (Light Emitting Diodes) used as quasi-monochromatic light sources at different wavelengths and measuring their forward voltage at a fixed value of the current one can obtain the ratio of Planck’s constant to elementary charge with an estimated error of the order of 6%.