Suppose that you have a glass tube filled with atomic hydrogen gas (H, not H2). Assume that the atoms start out in their ground states. You illuminate the gas with monochromatic light of various wavelengths, ranging through the entire IR, visible, and UV parts of the spectrum. At some wavelengths, visible light is emitted from the H atoms.
(a) If there are two and only two visible wavelengths in the emitted light, what is the wavelength of the incident radiation?
(b) What is the largest wavelength of incident radiation that causes the H atoms to emit visible light? What wavelength(s) is/are emitted for incident radiation at that wavelength?
(c) For what wavelengths of incident light are hydrogen ions (H+) formed?