Transmission Electron Microscopy (TEM) is a powerful imaging technique used to observe the internal structure of materials at the atomic level. It works by transmitting a beam of electrons through a thin sample, allowing scientists to visualize the arrangement of atoms and other features within the material. The electrons interact with the sample, producing an image that reveals fine details not visible with light microscopy. TEM is widely used in various fields, including materials science, biology, and nanotechnology. It provides high-resolution images that help researchers understand the properties and behaviors of different substances, contributing to advancements in technology and medicine.