1. Why do we specify that the foil be thin in experiments intended to check the Rutherford scattering formula?
2. The scattering of a particles at very small angles disagrees with the Rutherford formula for such angles. Explain.
3. How does the deduction of (4-3), which gives the trajectory of a particle moving under the influence of a repulsive inverse square Coulomb force, differ from the deduction of the trajectory of a planet moving under the influence of the gravitational field of the sun?