Answer:
For viewing ultra- structure
Explanation:
When any object, substance or biological specimen is so small that it cannot be viewed through normal optical telescopes then it become essential to use electron microscope. Thus electron microscope are used for inspecting wide range of ultra-structure
In an electron microscope , a beam of electron is thrown on the object which makes it advantageous over and above normal optical microscope which have certain limitations due to the limitations associated with light .
