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Microscopes

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Title: Microscopes


1
Microscopes

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(No Transcript)
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Development of the microscope
  • Anton van Leeuwenhoek
  • Father of Microbiology
  • Made his own lenses (some as powerful as the
    microscopes we use in class)

4
Microscopes
Type of microscope Focuses what Through /Surface Magnifies up to Live organisms?





5
Compound light microscope
  • Focuses light
  • Uses combination of lenses
  • Shines light through objects
  • Magnifies up to 1000 times (ours are 400x)
  • Can view live organisms
  • www.science.smith.edu/.../Labmanual/01CELLS.htm

6
http//www.bioweb.uncc.edu/1110Lab/notes/notes1/la
bpics/Elodea20Leaf40c.jpg
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Dissecting microscope
  • Focuses light
  • See surface of objects
  • Magnifies up to 40 times
  • Can view live organisms
  • Uses combination of lenses
  • wappingersschools.org/.../visualvocab/page4.html

8
http//www.keweenawalgae.mtu.edu/ALGAL_IMAGES/char
ophyceans/Chara_d2_LApond2e_3.15x.jpg
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Electron microscope
  • Two types
  • Transmission electron microscope (TEM)
  • Scanning electron microscope (SEM)

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Transmission electron microscope
  • Focuses electrons
  • Sees through objects
  • Magnifies up to 100,000 times
  • Can view only dead or inanimate objects
  • www.phy.cuhk.edu.hk/.../CM120/CM120.html

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Transmission electron microscope
  • Mammalian mitochondrion
  • biology.unm.edu/.../Summaries/Cell.html

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Scanning electron microscope
  • Uses electrons
  • View surface of objects
  • Magnifies up to 10,000 times
  • Views only dead or inanimate objects
  • http//gsc.nrcan.gc.ca/ebeam/sem_e.php

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Scanning electron microscope
  • Bee eye www.rdg.ac.uk/cfam/faciliti
    es/sem.htm

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  • Viruses budding
  • from a cell
  • Transmission electron microscope
  • Scanning electron miscroscope
  • www.
  • aecom.yu.edu/aif/gallery/sem/sem.htm

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Ion microscope
  • Uses positively charged ions
  • surface
  • Magnifies up to at least 1,000,000 times
  • Cannot view live organisms

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tungsten atoms through ion microscope
http//www.aip.org/mgr/png/images/wolkow.jpg
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Question 11 12
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