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This kit contains everything for single and double slit light interference and diffraction studies. It includes a vertical filament lamp with socket and 110v cord, graphite coating, microscope slides and razor blades (for making optical slits), and cellophane filters (red and blue).
This kit does not contain background information that explains the concept of single slit and double slit light interference although an explanation is readily available on Wikipedia and other websites. The kit does include all of the materials and the experimental procedure to perform these classic experiments.