PPT-Electron Microscope (EM)

Electron microscopy EM is an electron beam which is focused into a small probe across the surface of a specimen The first electromagnetic lens was developed in 1926 by Hans Busch . Jim Atherton. Development of Light Microscope. 1590 Hans Zacharias Janssen. 1660 Robert Hook. Onserved. . cells (cork). 1. Klein, Aaron E. The Electron Microscope: A Tool of Discovery. New . Y. ork,McGRaw. . 2. Compound Light Microscope. Used to observe small objects. Magnifies images up to 2000X their size. 3. Different parts of a microscope. copyright cmassengale. SCI.9-12.B-1.2. - [Indicator] - Use appropriate laboratory apparatuses, technology, and techniques safely and accurately when conducting a scientific investigation. Different types of microscopes. Objectives. Learners should . be able to:. explain how an electron microscope is different to a light microscope. define the terms magnification and resolution. convert units of measurement used in microscopy. The Microscope. An understanding of cells and the ultrastructure of cells had to wait until objects so small could be visualized by magnification.. Origin of the Microscope. The first record of the invention of a microscope was by Hans and Zacharias Janssen (Netherlands) in 1590?. Depth of . f. ield: small. Magnification. Uses lenses arranged in series, made of optical material that bends light. All magnification takes place via lenses. Uses . diascopic. illumination (that is, light is transmitted through the specimen). Magnification up to about 1000x.. Microscope Review The diagram represents a cell in the field of view of a compound light microscope. In which direction should the slide be moved on the microscope stage to center the cell in the field of view See Us at M&M 2020 in Milwaukee 1590. –first compound microscope. History of the Microscope. 1655 – . Robert Hooke. used a compound microscope to observe pores in . cork.. He called them . “cells”. History of the Microscope. Scanning electron microscope (SEM. ). 2- Transmission Electron Microscope. New Techniques in Microscopy:. Confocal Microscopy (Confocal Scanning Laser Microscope). Light Microscope. Electron Microscope. What Is Microscope?. It is an instrument which deals with too small organisms that they cannot be seen distinctly with the naked eye. Microscopes provide the observer with enhanced . resolution. (ability to observe two nearby objects as distinct objects), . By the end of this topic, you will be able to:. Name the parts of the microscope and their functions.. Use the microscope to observe biological specimens. Know the difference between the light microscope and the electron microscope. A . fluorescence microscope.  is an optical microscope that uses fluorescence and phosphorescence instead of, or in addition to, reflection and absorption to . study . organic . or inorganic substances. Microscopy. Foundations in Biology. SPEC. Objectives and Success Criteria. Objectives. Compare and contrast different types of microscopes. Describe the preparation of specimens for observation using microscopes. are boundaries that have . two dimensions,. and they normally separate regions of the materials that have . two different crystal structures. . . Example. : Grain Boundaries. . Grain Boundary.