Spectroscopy

Article

Spectroscopy is the study and measurement of interactions between radiation and matter as a function of wavelength, frequency, energy, or another spectral variable. It originally referred mainly to visible light but now covers many forms of radiation and particles.

Spectra may be produced through absorption, emission, scattering, fluorescence, diffraction, or resonance. Characteristic features arise from transitions between atomic, molecular, electronic, vibrational, rotational, spin, or nuclear energy states.

Spectroscopy can identify substances and measure composition, structure, concentration, temperature, pressure, motion, fields, and reaction dynamics. Different methods are selected according to the energy scale and material being investigated.

It is a central method in chemistry, physics, astronomy, biology, medicine, environmental science, remote sensing, archaeology, and materials research.

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• Source / publisher: Wikipedia
• URL type: WWW
• Credits: Wikipedia
• URL: https://en.wikipedia.org/wiki/Spectroscopy