What do sem and tem have in common?

Answer 1

Scanning electron microscopes and transmission electron microscopes use beams of electrons instead of light (light has a wavelength which gives a poorer resolution, as it is so big). The electron beams have very short wavelengths so the electron microscopes have higher resolutions (because the short wavelength means that the wave can pass through gaps that are too small for light waves to pass through. Because electrons are negatively charged the beam can be focused using electromagnets. Each EM microscope must have a vacuum in its chamber to work effectively because otherwise molecules in the air would interact with the electrons. Because of this living specimens may not be observed. A staining process is required for both The specimen must be extremely thin for both

Answer 2

SEM (scanning electron microscopy) and TEM (transmission electron microscopy) are both techniques used to study the structure and properties of materials at the microscopic level. Both techniques involve using electrons to visualize samples and provide high-resolution images. However, SEM is typically used for surface imaging while TEM is used to study the internal structure of materials.