Q.4 Can microorganisms be seen with the naked eye? If not, how can they be seen?

Microorganisms cannot be seen with the naked eye because they are very small. They can be seen with the help of a microscope. It is an instrument that produces enlarged images of small objects, thus allowing the observer to see an exceedingly close view of minute structures at a scale convenient for examination and analysis.

A simple microscope consists of a single lens that magnifies the object. A compound microscope consists of two lens system and is used for better magnification. The magnifying power of a microscope is an expression of the number of times, the object being examined appears to be enlarged.