What is the basic information of an electron microscope that everyone should know? What is its magnification? How can we differentiate between Compound And Electron Microscope?

Asked by vinitdoke | 3rd Jun, 2015, 07:43: PM

Expert Answer:

The basic information of an electron microscope is that we cannot observe things that are smaller than a few hundred nanometers using our eyes and visible light. Therefore, we need to use an electron microscope. Electron microscopes work by using an electron beam instead of visible light and an electron detector instead of our eyes.It has the properties of a wavelength that is much smaller than visible light. With this wavelength we can distinguish features down to a fraction of a nanometer.
 
The magnification of electron microscope is around 100000X - 500000X.
 
Compound Microscope
 
(i)Live or dead specimens can be seen.
(ii)Light rays are used to illuminate the specimen.
(iii)Magnification is around 500X - 1500X.
(iv)Specimen preparation takes few minutes to hours.
(v)It uses glass lenses
 
Electron Microscope
 
(i)Only dead and dried specimens can be seen.
(ii)Iluuminating source is beam of electrons.
(iii)Magnification is 100000X- 500000X.
(iv)Specimen preparation takes several days.
(v)All lenses are electromagnets.

Answered by Sivanand Patnaik | 4th Jun, 2015, 08:23: AM