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The topmost optic in a microscope is generally the eyepiece or ocular lens. Use the links below to view pictures with descriptive labels.
The answer is in the name. To focus the material or substance for a better/clearer view.
An Electron microscope is more sophisticated. They use electrons and allow you to magnify objects up to 2000000x and view said objects in 3D.
It depends on the design of the light microscope you are using. Modern microscopes use electric bulbs, but older designs use a mirror to reflect light from the Sun.
Electron Microscope
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In biology, the eyepiece in a typical light microscope is used for magnifying the image being viewed (the field of view) by 10 times. Secondly, the eyepiece also has a scale on it which is visible when you look down through the microscope at an image, or at your field of view. This scale has divisions on it which you can use to measure the length of the cellular structures you are looking at. So basically, the eypiece magnifies the image and has a scale on it which you can use to measure the structures in the cell.
the diaphragm
a microscope!!
light microscope
A microscope.
A regular microscope, use the 500X for details.
Electron Microscope
a microscope
Use the fine adjustment on ur microscope its the small knob
You would use an electron microscope to view a Golgi apparatus.
a microscope