IGNOU MCH 20 2026 - Write short notes on the following.

Question

Write short notes on the following.

21 Jan 2026

Answer :

Word Count : 252

Atomic and molecular spectroscopy is a branch of analytical chemistry that studies the interaction of electromagnetic radiation with atoms and molecules to obtain qualitative and quantitative information about substances. In atomic spectroscopy, atoms absorb or emit light at characteristic wavelengths. Techniques such as Atomic Absorption Spectroscopy (AAS) and Atomic Emission Spectroscopy (AES) are widely used. In AAS, atoms in the ground state absorb light of a specific wavelength, and the amount of absorption is proportional to the concentration of the element. AES, on the other hand,

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