The Wireless Diffraction System with Track contains all the equipment you need to perform labs and lecture demonstrations on Interference and Diffraction. This complete system includes the PASCO Diffraction Scanner combines a position sensor with a light sensor for scanning diffraction patterns. An included aperture setting allows for the adjustment of width-measurement resolution (and light attenuation). A hand crank allows for smooth scanning of diffraction patterns. Because of the wireless design, smooth scans are achieved effortlessly! This system enables students to scan many diffraction and interference patterns during one lab period. They can study the differences caused by changing the slit width, slit separation, and number of slits. And, by comparing patterns created by a Red Diode Laser to those of a Green Diode Laser, they can study the difference caused by a change in wavelength.