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5 Cards in this Set
- Front
- Back
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The invention of the microscope, telescope.
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- Occured in the 1600s, with an improvement of lense technology. Led to the discovery of cells.
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The invention of the electron microscope.
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Made by James Hillier and Albert Prebus at the University of Toronto.
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The transmission electron microscope, or TEM
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Creates images by streaming a beam of electrons through a thin slice of substance. Creates a two dimensional image.
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The Scanning Electron Microscope, or SEM.
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The image is produced by a beam of electrons, which scan the surface of the sample. As secondary electrons are re-radiated by the specimen, they form a quality 3 dimensional image.
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Scanning Tunelling Microscope (STM)
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an electron probe is placed near the surface of the sample, and an image is created which can be converted by computer to a topographical image. Used for atomic level imaging, manipulating molecules and atoms.
Used in nanotechnology. |
