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Why should mounting grinding polishing and etching process done first before conducting examination by using microscope?
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Who invented the first crude microscope by grinding glass?
Leeuwenhoek
How is a magnifying mirror made?
A round piece of plate glass is heated and slumped over a curved steel form then silvered on the convex side. Better ones were made by grinding and polishing a convex surface to one side of flat window glass then silvered on the curved side.
Where do evolutionists believe new stars are formed and why is this unlikely?
Despite all of your faithful, dedicated grinding, your axe is getting dull.
Who made better lenses for the microscopes?
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.
What was wrong with the Hubble Space Telescope when it was first launched?
When they started getting images back from the Hubble, thee was a distortion that should not have been there, and it was keeping the telescope from capturing really good images. It later turned out that there had been a mistake made in grinding the curved mirror.
What has the author Oskar Kylin written?
Oskar Kylin has written: 'Grinding and grinding machines' -- subject(s): Grinding and polishing
What has the author Walter Burkart written?
Walter Burkart has written: 'Mechanical polishing' -- subject(s): Grinding and polishing
What are ways that gems are used?
made for jewelry, plus grinding and polishing.
What has the author Johnson Heywood written?
Johnson Heywood has written: 'Grinding wheels and their uses' -- subject(s): Grinding and polishing
Are gems used for fuel?
no, they are used for jewelery, mechanical parts, & grinding & polishing
Name a hand held power device used for grinding and polishing?
I believe that's an angel tool?
Which is a example of a physical change?
Examples; melting, boiling, sublimation, grinding, polishing, extruding, pressing, etc.
Who invented the first crude microscope by grinding glass?
Leeuwenhoek
What has the author John R Kominsky written?
John R. Kominsky has written: 'Airborne asbestos concentrations during buffing, burnishing, and stripping of resilient floor tile' -- subject(s): Asbestos, Environmental aspects, Environmental aspects of Asbestos, Environmental aspects of Grinding and polishing, Grinding and polishing
What has the author G W Fynn written?
G. W. Fynn has written: 'The cutting and polishing of electro-optic materials' -- subject(s): Cutting, Electrooptics, Grinding and polishing, Materials, Optical materials
What is the definition of obrasive?
Do you mean 'abrasive' in which case it is any material or substance used for grinding and polishing. Such as Emery, Pumice or sandpaper
What is Metallography?
metallography is the science and art of preparing a metal surface for analysis by grinding,polishing, and etching to reveal it's microstructure constituent
