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Photo copyrighted (2005) by Andrew Wright/Lighthawk
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It's the underside of a ladybug!
Scanning
Electron Microscopy
What's
is it?
Scanning
Electron Microscopy is a technique using a special microscope to see small
things in great detail. The SEM can resolve from 15x to 100,000x power.
The process is time consuming and tedious.
The
insect, a Ladybug in this case, which is dead, is coated with a very thin
layer of a metal, like gold. It is positioned on the stage. An electron
beam is directed onto the specimen which scans back and forth over it.
The electrons are scattered due to the metal; that is what produces the
picture. But, only the surface of the specimen can be viewed.
Most
SEM's are equipped with a camera, so that a photograph can be taken.
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