Electron Microscope:

It is the most advanced form of Microscope

Structure of Electron Microscope:

In EM, the object and the lens are placed in a vacuum chamber and a beam of electrons is passed through the object. Electrons passed through or are reflected from the object and make an image. Electromagnetic lenses in the large end focus the image onto a screen or photographic film.

Resolving Power of Electron Microscope:

The EM has much more resolving Power than the LM. The most modern EM can distinguish objects as small as 0.2nm (nm) and 1nm=1/1000mm. It is a 1000-fold improvement over the LM.

Uses of Electron Microscope:

Under special conditions, EM can detect individual atoms. Cells, organelles, and even molecules like DNA and proteins are much larger than single atoms.

Types of Electron Microscope:

Biologists use two types of Electron microscopes:

1. Transmission Electron Microscope (TEM)
2. Scanning Electron Microscope (SEM)