Where does the Paschen series of spectral lines from hydrogen gas appear in the electromagnetic spectrum?
A) radio range, with wavelengths longer than 0.01 m or 10 mm
B) ultraviolet region, with wavelengths between 90 nm and 130 nm
C) infrared, with wavelengths longer than 700 nm
D) visible region, with wavelengths between 350 nm to 660 nm

Question

Quizplus · Accepted Answer

The Paschen series of spectral lines from hydrogen gas appears in the infrared region of the electromagnetic spectrum, with wavelengths longer than 700 nm. This series corresponds to electronic transitions from higher energy levels to the n=3 level.

Where Does the Paschen Series of Spectral Lines from Hydrogen