Microscopes
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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

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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


Microscopes

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


Microscopes

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


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