Tuesday, June 5, 2012

Interesting Science History


Microscope.

The word microscope is made of 2 Greek words micros which means small and scopos which means watcher. It is a device used to see very small things which are invisible to human eye.  Re Microscope has 2 types, simple microscope-which is normally a magnifying glass snd compound microscope such as in the given picture. It has 2 lens, eye piece and objective lens. Eyepiece magnifies an image and objective shows the image to us. There are several lens for eyepiece and objective. The compound microscope was invented between 1590 and 1610. In about 1597 two Dutch eyeglass makers, Zaccharias Janssen and his son Hans were experimenting with lenses in a tube. They observed that nearby objects viewed through two lenses in line were magnified. Their device was the first compound microscope.

However, their lenses were rather large and the magnification obtained was only about 10X.Leeuwenhock, a dutch scientist is known as “the father of microscope” as he discovered many things of microscope.He was also the fist scientist to see microscopic life and also the first scientist to see the whole circulation of blood through his microscope. Galileo also designed a compound microscope, but it was only useful for reflected light. Robert Hooke built the first useable British compound microscope in about 1655. Minor mechanical and optical improvements were made to compound microscopes over the years, but no major improvements were made until the 19th century. 


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