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Microscopes. Section 2.2. History and use of the microscope. http://www.youtube.com/watch?v=ZYNThPzh03c. History of the Microscope. Antoine van Leeuwenhoek 1 st to see single-celled organisms in pond water. History of the Microscope.

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microscopes

Microscopes

Section 2.2

history and use of the microscope

History and use of the microscope

http://www.youtube.com/watch?v=ZYNThPzh03c

history of the microscope
History of the Microscope
  • Antoine van Leeuwenhoek
    • 1st to see single-celled organisms in pond water
history of the microscope1
History of the Microscope
  • 1655 – Robert Hooke used a compound microscope to observe pores in cork
    • He called them “cells”
history of the microscope2
History of the Microscope
  • 1590 –first compound microscope
microscope vocabulary
Microscope Vocabulary
  • Magnification: increase of an object’s apparent size
  • Resolution: power to show details clearly
  • Both are needed to see a clear image
types of microscopes
Types of Microscopes
  • 1. Compound Light Microscope
    • 1st type of microscope, most widely used
    • light passes through 2 lenses
    • Can magnify up to 2000x
slide9

Ocular lens

Objective lenses

types of microscopes1
Types of Microscopes
  • 2. Electron Microscope
    • Used to observe VERY small objects: viruses, DNA, parts of cells
    • Uses beams of electrons rather than light
    • Much more powerful
types of microscopes2
Types of Microscopes
  • Transmission Electron Microscope (TEM)
    • Can magnify up to 250,000x
types of microscopes3
Types of Microscopes
  • Scanning Electron Microscope (SEM)
    • Can magnify up to 100,000x
slide17

Parts of a Microscope

http://www.youtube.com/watch?v=KzNsuiqW1LQ

how to use a microscope
How to use a microscope
  • http://www.youtube.com/watch?v=X-w98KA8UqU