Final answer:
The hydrogen spectrum containing the Lyman, Balmer, and Paschen series is known as the line spectrum, with the Lyman series in the UV, the Balmer series partially in the visible range, and the Paschen series in the IR. The correct option is B. Line spectrum.
Step-by-step explanation:
The spectrum of hydrogen that consists of the Lyman, Balmer, and Paschen series is known as the line spectrum. These series represent transitions of electrons between different energy levels in a hydrogen atom and produce distinct lines at specific frequencies.
The Lyman series corresponds to transitions ending in the ground state (n=1) and emits ultraviolet radiation. The Balmer series involves transitions to the second energy level (n=2), and some of these lines are visible. The Paschen series, on the other hand, refers to transitions that result in infrared emissions. The correct option from the choices provided is B. Line spectrum. The correct option is B. Line spectrum.