Microscopes and It's History - PowerPoint PPT Presentation
Title:
Microscopes and It's History
Description:
A microscope (from the Ancient Greek: μικρός, mikrós, "small" and σκοπεῖν, skopeîn, "to look" or "see") is an instrument used to see objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using such an instrument. Microscopic means invisible to the eye unless aided by a microscope. – PowerPoint PPT presentation
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Title: Microscopes and It's History
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Microscopes
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History of the Microscope
- 1590 first compound microscope
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- 1655 Robert Hooke used a compound microscope to
observe pores in cork - - He called them cells
- Antoine van Leeuwenhoek
- - 1st to see single-celled organisms in pond
water
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Microscope Vocabulary
- Magnification increase of an objects apparent
size - Resolution power to show details clearly
- Both are needed to see a clear image
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Types of Microscopes
- 1. Compound Light Microscope
- 1st type of microscope, most widely used
- light passes through 2 lenses
- Can magnify up to 2000x
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- 2. Electron Microscope
- Used to observe VERY small objects viruses, DNA,
parts of cells - Uses beams of electrons rather than light
- Much more powerful
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Transmission Electron Microscope (TEM) Can
magnify up to 250,000x
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Scanning Electron Microscope (SEM) Can magnify up
to 100,000x
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