On each side of the microscope (close to the base) is a large knob with a smaller knob in the middle. This large knob is used to bring an object into close focus as it moves the stage ( l ) up or down. NOTE: the coarse-adjustment knob is used ONLY with the scanning or low-power objective lenses.
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Explanation:
On each side of the microscope (close to the base) is a large knob with a smaller knob in the middle. This large knob is used to bring an object into close focus as it moves the stage ( l ) up or down. NOTE: the coarse-adjustment knob is used ONLY with the scanning or low-power objective lenses.