What do Electrons Microscopes use to focus and Magnify on an Image?

Electron microscopes use focused beams of electrons instead of light to magnify images. Electromagnetic lenses control and focus the electron beams, allowing for extremely high resolution and magnification, far surpassing that of light microscopes. The interaction of electrons with the sample produces detailed images based on various signals, such as secondary electrons or transmitted electrons. This technique enables the visualization of structures at the nanometer scale.