PicoScope 7 Software
Available on Windows, Mac and Linux
High speed and high resolution. Breakthrough ADC technology switches from 8 to 16 bits in the same oscilloscope.
This experiment investigates the variation in light intensity across a monochromatic diffraction pattern produced by a diffraction grating.
The experiment was set up as shown in the diagram below.
The laser pointing and grating were fixed in position (using Lego blocks) and the diffraction pattern displayed on a white card placed about 5 cm beyond the grating. The card was removed and the DrDAQ data logger put in its place. The height of the laser was then adjusted so that the diffraction pattern (a series of dots) coincided with the internal light sensor.
PicoLog was set to start recording data and to display a graph of the results (axes were set to automatic).
Once recording had started DrDAQ was moved slowly across the diffraction pattern at right angles to the optical axis. A pattern of maxima and minima should start to appear on the graph.