Types of microscopes

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1. Why are TEM's good?

  • They give high resolution images , so you can see the internal structure of the organelles. Such as chloroplasts.
  • They give coloured images and you can see smaller organelles.
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2. What is good about SEM's?

  • SEM's can be used on thick specimens.
  • SEM's are quicker and easier to use.

3. How does an Electron microscope work?

  • They use electrons to form an image.
  • They use light to form an image.

4. How so SEM's work?

  • They scan a beam of electrons across the specimen. This knocks off electrons from the specimen, which are gathered in a cathode ray tube to form an image.
  • They screen a beam of electrons across a specimen. This knocks off the electrons from the specimen, which are gathered in a cathode ray tube to form an image.

5. DO SEM's produce 2-D or 3-D images?

  • They can produce 3-D images.
  • They can only produce 2-D images.

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