Astronomy & Space Science · AST-837
Spectroscopy & Spectral Analysis: Structures & Vocabulary
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Structure
Structure of Spectroscopy & Spectral Analysis
A reduced spectrum contains wavelength, flux, uncertainty, continuum, and line features. Spectral resolution determines the smallest wavelength differences that can be distinguished, while signal-to-noise controls precision.
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Source library for this chapter
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- 01Radiation and Spectra — SummaryOpen source ↗
OpenStax Astronomy 2e
- 02Visible-Light Detectors and InstrumentsOpen source ↗
OpenStax Astronomy 2e
View claim-by-claim traceability3 verified claims
Atoms and molecules absorb or emit at quantized energies; motion Doppler-shifts lines; collisions and pressure broaden them; magnetic fields can split or polarize transitions.
supported · checked Sep 22, 2026Laboratory transition wavelengths match astronomical lines, and repeated measurements reproduce velocities and abundance patterns.
supported · checked Sep 22, 2026Spectroscopy separates light by wavelength so that continuum shape and spectral lines can be measured quantitatively.
supported · checked Sep 22, 2026