NEET BIOLOGY

Detailed explanation-1: -Electron Microscopes (EMs) function like their optical counterparts except that they use a focused beam of electrons instead of photons to “image” the specimen and gain information as to its structure and composition.

Detailed explanation-2: -The SEM is an instrument that produces a largely magnified image by using electrons instead of light to form an image. A beam of electrons is produced at the top of the microscope by an electron gun.

Detailed explanation-3: -There are two main types of electron microscope – the transmission EM (TEM) and the scanning EM (SEM). The transmission electron microscope is used to view thin specimens (tissue sections, molecules, etc) through which electrons can pass generating a projection image.

Detailed explanation-4: -The two main types of electron microscopes are the transmission electron microscope (TEM) and the scanning electron microscope (SEM).