Electron beams are streams of electrons that are emitted from a source, typically a heated filament or a cathode. These electrons are accelerated through an electric field, allowing them to travel at high speeds. Electron beams are commonly used in various applications, including cathode ray tubes in televisions and computer monitors, as well as in electron microscopes for imaging tiny structures. In addition to imaging, electron beams are utilized in industrial processes such as electron beam welding and electron beam lithography. These techniques take advantage of the high energy and precision of electron beams to join materials or create intricate patterns on surfaces. Overall, electron beams play a crucial role in both scientific research and practical applications.