Microscope.

A microscope is an instrument that magnifies extremely small objects so that they may be easily seen.
It can produce a much larger image of a tiny object.
The microscope is one of the most important instruments of science.
A microscope has two lens system- the objective and the eye- piece.
The lens which is turned towards the object to be viewed is called the objective and the other, with which observation is made, is called the eye- piece. The purpose of these two sets of lenses is to increase magnification. The first compound microscope was made by a Dutch spectacle maker named Lacharia's Jausen around 1590. Later on during the mid 1600's another dutch amateur scientist Anton Van Leeuvenhock made a microscope with powerful lenses to observe microscopic life through it.
These microscopes were much more powerful than the compound microscopes.
By early 1800's improvements had been made in the above microscope better glass came to be made and so the first electron microscope was made in 1931.