Examlex
How did the great economist John Maynard Keynes explain his comment that although economics is an easy subject compared with the higher branches of philosophy or pure science, it is a subject at which few excel?
Fine Adjustment Knob
A part of a microscope used to make small adjustments in focus, enhancing the clarity of the image.
Aperture
An opening, hole, or gap, often referring to the variable opening in the lens of a camera through which light passes.
Revolving Nosepiece
A part of a microscope that holds multiple objective lenses and can rotate to change magnification.
Objective Lens
An objective lens is the part of a microscope or telescope that gathers light from the sample being observed and focuses it to create an image.
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