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Sagot :
The coarse focus knob on the SI V-Scope lowers and raises the microscope stage and uses power to focus.
The coarse focus knob on most microscopes is located around the bottom center part of the arm of the microscope as illustrated in the image below. The larger of the two knobs and one that is closest to the microscope's arm is the coarse adjustment knob.
Only the lowest power objective lens should be used with the coarse focus knob. You will only need to utilize the fine focus once it is in focus. With higher lenses, using the coarse focus could cause the lens to fall into the slide.
Focus (coarse), The coarse focus knob is used to roughly or almost focus the specimen. Focus (fine), After bringing the image into focus with the coarse focus knob, use the fine focus knob to make it more sharply focused.
To know more about coarse knob refer to: https://brainly.com/question/16572510
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