Microscope

by VasylLoboiko
Last updated 4 years ago

Discipline:
Science
Subject:
Inventors and Inventions

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Microscope

Microscope

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A microscope is a scientific instrument that reveals objects which are normally too small for the human eye to see. Microscopes use several lenses to provide a large image of a tiny object and they have been so important in the study of Biology.The discovery of glass over 2000 years ago led to early experiments with lenses. People noticed that single lenses could make objects larger and also that they could focus the sun's rays to start a fire. These early lenses were called 'burning glasses'. This led to the development of eye-glasses or spectacles in the early 1300s.In the late 1500s, two Dutch spectacle makers, Hans and Zaccharias Janssen invented the first true microscope. They used several lenses together in a tube and discovered that they could make objects look many times bigger. Galileo, an Italian scientist, improved the quality of the lenses to produce better quality microscopes and telescopes.Anthony Leeuwenhoek (1632-1723) and Robert Hooke (1635-1703) were two early users of the microscope who made many important discoveries. Leeuwenhoek discovered bacteria and showed how a drop of water is full of living creatures. Robert Hooke wrote a book Micrographia which described this new world of micro-organisms, with drawings that amazed the world.For two hundred years, there was little development of the microscope until new industrial techniques produced accurate and powerful lenses. Before this time, people made the lenses by hand and they were often inaccurate. In the early twentieth century, the USA and Germany produced powerful microscopes (xl000) in large numbers for export around the world.Nowadays, scientists still use microscopes that use light to see small objects such as cells and micro-organisms. However, they also have extremely powerful microscopes that use a different technology. These electron microscopes have a magnification of a million times and now we can see molecules and atoms.To my mind, a microscope is one of the most important inventions which have really shaped our life. Without a microscope, scientists could not detect different diseases, produce vaccine or discover new bacteria etc. We often use microscope at the lessons of Biology, Chemistry and sometimes Physics and it helps us to understand and study these subjects better.


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