Question

State the principle of metallurgical microscope

Answer 1

Since the metallographic specimens are opaque to light, the sample must be illuminated by reflected light. The metallurgical microscope is therefore based on reflected light principle. It has to be appreciated that the biological microscope works on transmitted light principle

Answer 2

Principles of the metallurgical microscope:

• A reflector of plane glass reflects a horizontal beam of light downward and a beam of light goes through the objective of the microscope and falls on the specimen that you want to observe.  
• Some light rays get reflected by the surface of the specimen and get magnified. These magnified rays then go through the plane glass reflector and get magnified by the lens in present in eye-piece.