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developers of the electron microscope
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What year did Hans and zacharias janssen make the first compound microscope?
They discovered the microscope in 1595
How can you determine the size of an object using the microscope?
There are special microscope slides available, which have on them a millimeter scale graduated down to 1/100 of a mm. Manufacturers of microscopes make these.
Why the invention of the microscope led to the discovery of cells?
Because the microscope was the first measurement tool that could make objects as small as cells visible. Before that there was no evidence for the existence of cells.
How does the lens of a light microscope make things look larger?
Look at your hand - 'end-on' and you see five finger-tips. The effect of the magnifying lens is to 'discard' the fingers to the left and right, and enlarge the image that remains in the center of the field of view.
What did Anton Van Leeuwenhoek first look at with the microscope?
Anton van Leeuwenhoek, at age 16, first saw cloth through a microscope. He was an apprentice to a merchant who sold cloth and the merchants used microscopes to inspect the threading and weave. Six years later, he acquired a shop of his own and, of course, a microscope of his own for the purpose of looking at cloth. At some point, his interests went beyond his business and he learned to polish glass and make his own lenses. About 1670 he discovered a way to make very small spherical lenses. This allowed much greater magnification, up to 250 times. (Some people think that he evnetually made lenses with magnifications almost twice that.) After discovering the technique (which he kept secret) he saw many fantastic things, including microorganisms in water. The first thing he officially described in a letter to the Royal Society of London were his observations and drawings of the parts of a bee. Later, he described microorganisms in water.
How did max knoll and ernst ruska make the electron microscope?
s h i t i want to know
What did Ernst Ruska make in the 1933?
The Scanning Electron Microscope
How do the characteristics of electron microscopes make them useful for studying cells?
Richard tElectron microscope is a very special tool which uses electron beam and invented by knoll and ruska which classified as transmission electron microscope uses 2d electron beam which clearly seen the internal structure of the cell and scanner electron microscope uses 3d electron beam which sweeps over the specimen.So it is very powerful with 5000 magnification of the object than a simple microscope.
Did Robert Hooke the first scientist to make a microscope?
Yes, he did make the first microscope.
Who invented the scanning electron microscope?
During the 1st century AD (year 100), glass had been invented and the Romans were looking through the glass and testing it. They experimented with different shapes of clear glass and one of their samples was thick in the middle and thin on the edges. They discovered that if you held one of these "lenses" over an object, the object would look larger. Someone also discovered that you can focus the rays of the sun with one of these special "glasses" and start a fire. These early lenses were called magnifiers or burning glasses. The word lens by the way, is derived from the latin word lentil, as they were named because they resembled the shape of a lentil bean (look up lens in a dictionary). These lenses were not used much until the end of the 13th century when spectacle makers were producing lenses to be worn as glasses. The early simple "microscopes" which were really only magnifying glasses had one power, usually about 6X - 10X . One thing that was very common and interesting to look at was fleas and other tiny insects. These early magnifiers were hence called "flea glasses". Sometime about the year 1590, two Dutch spectacle makers, Zaccharias Janssen and his father Hans started experimenting with these lenses. They put several lenses in a tube and made a very important discovery. The object near the end of the tube appeared to be greatly enlarged, much larger than any simple magnifying glass could achieve by itself! They had just invented the compound microscope (which is a microscope that uses two or more lenses). Galileo heard of their experiments and started experimenting on his own. He described the principles of lenses and light rays and improved both the microscope and telescope. He added a focusing device to his microscope and of course went on to explore the heavens with his telescopes. Anthony Leeuwenhoek of Holland became very interested in lenses while working with magnifying glasses in a dry goods store. He used the magnifying glass to count threads in woven cloth. He became so interested that he learned how to make lenses. By grinding and polishing, he was able to make small lenses with great curvatures. These rounder lenses produced greater magnification, and his microscopes were able to magnify up to 270X! Anthony Leeuwenhoek became more involved in science and with his new improved microscope was able to see things that no man had ever seen before. He saw bacteria, yeast, blood cells and many tiny animals swimming about in a drop of water. From his great contributions, many discoveries and research papers, Anthony Leeuwenhoek (1632-1723) has since been called the "Father of Microscopy". Robert Hooke, an Englishman (who is sometimes called the "English Father of Microscopy"), also spent much of his life working with microscopes and improved their design and capabilities. Little was done to improve the microscope until the middle of the 19th century when great strides were made and quality instruments like today's microscope emerged. Companies in Germany like Zeiss and an American company founded by Charles Spencer began producing fine optical instruments. Today, there are no microscope manufacturers in the US and most of the microscopes come from Germany, Japan and China. Toy plastic microscopes should be avoided as they do not achieved the level of quality of the basic instruments with metal frames and glass lenses. Because of foreign production, quality microscopes have become affordable for all. Zaccharias Janssen, the inventor of the microscope would marvel at the quality of even the most basic microscopes found in schools today.
How can you make a Microscope?
For your information, you can't make a microscope all by yourself. Compound machines are need.
How do you make a sentence microscope?
I've left the microscope in the trunk of my car!
How would you make a cell phone microscope?
You cannot make a cell phone microscope. A cell phone is for talking and to text.
What wheel do you use on a microscope to make the image clearer?
To make the image clearer on a microscope you can use the focusing lens.
How much do partners at ernst and young make?
The partners at Ernst and Young make a lot of money. It would vary of course, but a person at the Ernst and Young company would make roughly $350k and it could either go up, or go back down. Depending on the rates, and the client.
What discoveries did microscope make?
cells
How do you make a conclusion about microscope?
You think
