History of microscopes and the science of light, focusing on how both are crucial for understanding and visualizing the microscopic world. The first source traces the evolution of microscopy from the early lens-makers to pioneers like Antonie van Leeuwenhoek and Robert Hooke, who made groundbreaking observations with their simple and compound microscopes. It emphasizes the impact of their discoveries on the development of microbiology. The second source explains the properties of light waves, including their wavelength, frequency, and interactions with matter. It delves into the principles of refraction and lenses, illustrating how these concepts enable microscopes to magnify and resolve images. The text also introduces the electromagnetic spectrum and the role of fluorescence in microscopy.