AST-838intermediate

Spectroscopy & Spectral Analysis: Physical Mechanisms

Spectroscopy separates light by wavelength so that continuum shape and spectral lines can be measured quantitatively. Spectroscopy is fundamental to stellar classification, redshift, chemical abundance, exoplanet atmospheres, radial velocity, plasma diagnostics, and galaxy evolution.

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Spectroscopy & Spectral Analysis: Physical Mechanisms

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AST-837Spectroscopy & Spectral Analysis: Structures & Vocabulary→

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AST-839Spectroscopy & Spectral Analysis: Observation, Measurement & Evidence→

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Spectroscopy separates light by wavelength so that continuum shape and spectral lines can be measured quantitatively.

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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.

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