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Published byWilliam Blake Modified over 9 years ago
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Notes: The History of the Microscope
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Magnifying Glass, 13 th C First used as a “burning glass” Began being used to improve vision in the early 13 th century
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Glass Lens, 1268 Discovered by Roger Bacon in 1268 Began use in eyeglasses between 1268 and 1289
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Telescope, 16 th C Invented by Hans Lippershay Improved by Galileo Galilei, who was the pioneer for modern astronomy
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First Microscope, late 16 th C Basically, this was a tube with a plate at one end and a lens at the other Magnified objects 10X
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Improvements Zaccharias Jansseen, and his son Hans, added a second lens in 1597
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Marcello Malphighi Studied human “physiology” (cells of the human body) Worked from 1653 until his death in 1694
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Robert Hooke First looked at cork under the microscope; gave them the name “cells” Wrote the book Micrographia in 1665 Considered the “English father of microscopy” Developed and used the compound microscope
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Antoni van Leeuwenhoek Dutch maker of microscopes Also called the “father of microscopy” Was able to invent a microscope that magnified 270X Made over 500 microscopes
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Microscopes of Today Compound microscope: creation of microscope stages and clips, slides, and objective lenses; smooth focus and magnification; uses 2 lenses
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Electron Microscope Uses electrons to light up an image Electron gun emits electrons in a vacuum Electrons strike substance and image is recorded on a computer monitor Two Types-
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Two Types of Electron Microscopes 1.Transmission Electron Microscope (TEM)- looks at large samples 2.Scanning electron microscope (SEM)- looks at thinly cut samples
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Scanning Probe Microscope Uses a probe to scan the surface of a sample and provides a 3-D image Probe has a sharp metal point (single atom thick at the tip) Probe moves up and down over the surface of the object and feeds data into a computer, which provides the image
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