Electron Microscope

An electron microscope is a powerful tool used to see objects that are too small for regular microscopes. It works by using a beam of electrons instead of light to magnify objects.

When electrons pass through the specimen, they interact with its atoms, producing an image. This method allows for much higher magnification and resolution than traditional microscopes.

Working Principle of Electron Microscopes

Working principle of electron microscopes is:

• The Electron Source emits a stream of high-voltage electrons (typically 5-100 keV) and accelerates them in a vacuum towards the sample using electrical potentials.
• The stream is condensed into a thin, single-colored, focused electron beam by using electromagnetic lenses and directed onto the sample by means of magnetic lenses.
• Interactions between the irradiated sample and the primary electron beam influence each other and produce products like secondary electrons or X-rays.
• The result of these interactions are identified and converted into an image.

An electron microscope (EM) is a type of microscope that uses an electron beam as a light source. It uses electron optics, which are similar to light microscope lenses, to guide the electron beam. Electron microscopes are used to see substance which are extremely small and are not visible by normal optical microscopes. In this article, we will learn about the various uses of electron microscope in detail.