Protons of energy 5.7 MeV are incident on a gold foil of thickness 4.4 x 10-6 m. What fraction of the incident protons is scattered at the following angles? (The density of gold is 19.3 g/cm³, and its molar mass is 197.0 g/mol. Give your answer in decimal notation, e.g., 0.05 for 1/20.) (a) greater than 90° (b) less than 5⁰

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de Broglie Equation

The sketch of matter waves is drawn below: