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The long-range dipole field interaction between a low energy electron and the hydrogen atom in the n = 2 state is shown to be the key for understanding significant features of a number of H– detachment processes. Collisional, single photon, and two-photon detachment processes are examined, each of which is shown to be sensitive to different aspects of low-energy H(n=2)–e– interactions. Specifically, these detachment processes are best suited respectively for exhibiting the finite threshold cross sections for certain 1Se, 1P0, and 1De final-state channels, the shape resonance in one of the 1P0 final state channels, and the near-threshold Galitis-Damburg oscillations in certain 1Se and 1De final state channels. The latter oscillations have yet to be observed experimentally in any process.