Spectroscopy is :

the study of heat changes in a chemical reaction.

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the use of the absorption, emission, or scattering of electromagnetic radiation by matter to study the matter or the chemical processes it undergoes.

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the mathematical description of the motion and interaction of subatomic particles. It incorporates quantization of energy, wave-particle duality, the uncertainty principle, and their relationship to chemical processes.

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none of the above

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Solution

The correct option is B the use of the absorption, emission, or scattering of electromagnetic radiation by matter to study the matter or the chemical processes it undergoes.
Spectroscopy is the study of interaction of electromagnetic radiation with matter. The phenomenon used in spectroscopy are absorption, emission, or scattering of electromagnetic radiation by matter.

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