Figure 5. Measured voltages upon changing the mirror displacement up to 15 μm, the number of maxima corresponds to the number of observed light-dark transitions in the interference pattern

From

Low-cost Spectroscopy: Experiments in Various Spectral Ranges

Patrick Gräb, Ekkehard Geidel, Hans-Christian Schmitt

World Journal of Chemical Education. 2021, 9(4), 144-151 doi:10.12691/wjce-9-4-7