Pfund series
Quick Summary
The Pfund series is one of the five spectral line series produced by hydrogen atoms. These series are related sequences of wavelengths emitted by energized atoms. The Pfund series, along with the Paschen and Brackett series, is located in the infrared region of the electromagnetic spectrum.1
Similar to the well-known Balmer series, the wavelengths in the Pfund series can be described by a formula. This formula relates the reciprocal wavelength to the Rydberg constant and the difference between two terms involving squares of integers. Specifically, for the Pfund series, the electron transitions from a higher energy state to the energy level where the principal quantum number is 5.12
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