Notebook

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Notebook 11 Discovering a New World
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Magnification

• The ability to make an image appear larger than
  its actual size

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Resolution

• A measure of the clarity of an image

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Discovery of Microorganisms

• Antony van Leeuwenhoek (1632-1723)
• first person to observe and describe
  micro-organisms accurately

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Light Microscope

• Light passes through one or more lenses to
  produce an enlarged image of a specimen

Disadvantage Weak Magnification Advantage
Live Specimens
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Compound Light Microscope

• Has multiple lenses (objectives) through which
  light passes to produced an enlarged image

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Daphnia Compound Microscope
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Electron Microscopes

• Form an image of a specimen using a beam of
  electrons rather than light

Disadvantage Specimens are killed Advantage
Powerful Magnification
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Scanning Electron Microscope
3 D Images Measures voltage differences to
create the image
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Fly head
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Transmission Electron Microscope

• Flat Image
• Electron beam passes through a thin slice of the
  specimen

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Ebola
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• Scale of Microscope and unaided Visibility

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Journal