申論題

1.(10%) Quantum mechanics predicts that the energy ofthe ground state ofthe H atom is -13.6 eV. Insight into the magnitude of this quantity is gained by considering several methods by which it can be measured.

(b) (3%) Assume the atom is ionized by collision with an electron that transfers all its kinetic energy to the atom in the ionization process. Calculate the speed of the electron before the collision. Express your answer in meters per second (m s^-¹)