A light microscope is a tool that uses visible light and lenses to magnify small objects, making them easier to see. It is commonly used in laboratories to study cells, tissues, and microorganisms. By shining light through a sample, the microscope allows scientists to observe details that are not visible to the naked eye, such as the structure of cells or the movement of bacteria. These microscopes come in various types, including compound and stereo microscopes. A compound microscope has multiple lenses for higher magnification, while a stereo microscope provides a three-dimensional view. Both types are essential for research in fields like biology and medicine.