an experiment, it was observed that a backward scattered ( an angle greater or equal to 90 degrees) alpha particles formed a beam that was energetic and was directed at a piece of gold foil as thin as 6.0 * 10^-7m. Assuming that an alpha particle scatters from the foil, what is the maximum scattering angle?

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Rutherford's scattering experiment

Rutherford’s scattering experiment is also known as the gold foil experiment. This experiment disproved the plum pudding model of J.J. Thomson. In a gold foil experiment, high-energy alpha particles are made to strike a thin gold foil. The scattered alpha particles are detected using a detector. This experiment showed that the positive charge of the atom is at the center. Most of the atom’s mass is also confined to a small volume at the center. This region is known as the nucleus of the atom.