Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

In the same year, the scientists behind this experiment corrected the work function for tungsten by taking into account the Schottky effect. A second test conducted by the scientists behind this experiment noted that there was no change in polarization, and the insulation in the apparatus was too weak to use a retarding potential. Fadley modified the apparatus to allow molecular beam epitaxial growth, and part of the interpretation relied on a formula that gives the index of refraction in terms of the bombarding potential. Changing the angle of the detector gave a maximum at 50 degrees, while another component was previously determined to have a plane spacing of 2. 15 angstroms on its {111}-face, leading to a wavelength of 165 nm according to Bragg's Law. Performed at Bell Labs and used to test the de Broglie relation, for 10 points, name this experiment where a beam of electrons was fired at a Nickel target, a proof of wave-particle duality.
Science