This lecture covers the basic principles of nuclear magnetic resonance (NMR) spectroscopy, including the concept of chemical shifts, energy levels due to Zeeman interaction, and the use of electromagnetic radiation to induce transitions between energy levels. It also discusses the observation of NMR spectra and the quantification of nuclear shielding/de-shielding. The presentation includes examples such as the ¹H NMR spectrum of ethanol and a proton NMR spectrum of a solvent mixture.