Infrared (IR) spectroscopy is a powerful technique that allows to obtain information about the chemical structure of a variety of substances by utilizing infrared electromagnetic radiation. In this science video we will discuss the basics of this technique with the help of 3D animations and also perform a practical demonstration, where we study a Teflon substrate with ATR technique. Copyright: Captain Corrosion OÜ Animation Library: https://captaincorrosion.com/animations/ Follow us on Facebook: https://www.facebook.com/CaptainCorrosion/