Perera,K. Sarath D2025-02-062025-02-062022-06https://dr.ichemc.ac.lk/handle/123456789/114Page 71-75Molecules have different energy states: electronic, vibrational, rotational, and nuclear. Quantized energy is responsible for each transition (e.g., rotational - microwaves, infrared - vibrational) within the molecule.enUV-visible SpectroscopyArticle