Students can actually manipulate the diffraction and interference pattern using this scale model of the Young’s Double Slit experiment. The model is 20,000 times larger than the wavelength (600 nm) of the HeNe laser diffraction as seen through a variable slit separation. Actual measurements of the angular displacements can be made and compared to the Young’s equation. The black plexiglass backplate measures 57 cm x 40 cm and has a mounting bracket.
Operating instructions include suggestions for student activities.