Examlex
A typical JFET has an input resistance of
Parfocal Microscope
A microscope designed such that once an object is in focus at one magnification, it remains in focus when the magnification is changed.
Objective Lens
The part of a microscope closest to the object being observed, which focuses light or electrons to create an enlarged image.
Ocular Lenses
The lenses closest to the eyes in a microscope, binoculars, or other optical instruments, enhancing the user's ability to see small details.
Compound Microscope
An optical instrument consisting of a series of lenses that magnify objects in steps; used for detailed observation of microorganisms and cells.
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