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coarse adjustment knob
The "base" supports the microscope. The "arm" holds the eyepiece, bodytube, fine and coarse adjustment knob, nosepiece, and the high and low power objective which connects to the "base. "
The eyepiece does.
The Stage.
Fine Adjustment Knob
The coarse adjustment is used to focus in on the specimen. It accomplishes this by moving the stage or the upper part of the microscope.
coarse adjustment knob
The coarse adjustment is used to focus in on the specimen. It accomplishes this by moving the stage or the upper part of the microscope.
When turning the coarse adjustment on a microscope upwards or downwards, the distance between the tube and the stage changes. This changes the detail of what you can see of the specimen you are examining.
Coarse Adjustment
I believe it's the coarse adjustment.
Assuming that you were talking about a microscope, then . . . the fine adjustment is really the normal adjustment. It's easy to use to get a great focus because it moves the focusing mechanism very little per turn. On the other hand, the fine adjustment simply won't get you close to initial focus without spending a day or two turning the dern thing. On the other hand, the COARSE focusing knob will get you NEARLY to correct focus in a flash.
The "base" supports the microscope. The "arm" holds the eyepiece, bodytube, fine and coarse adjustment knob, nosepiece, and the high and low power objective which connects to the "base. "
For course focusing the primary stage is used.
First of all, one should never call it high power, it is morecommonly called the "high objective", yet that is not what this question is asking. To answer the question: You use the fine adjustment knob. This knob should be located near the coarse adjustment knob, on the opposite side of the microscope (at the same height as the coarse adjustment knob), or even as a separate knob protruding from the coarse adjustment knob. The fine adjustment knob is smaller in size. You should never, ever use the coarse adjustment knob under the high objective, you could scratch the microscope slide, cover slip, high objective lens, or in a worst case scenario break the high objective lens.
Because if you use coarse adjustment, the body tube of the microscope (the part that moves up and down when you turn the knobs) will hit the microscope slide and cause the slide to break/crack. It moves the tube very quickly . You also run the risk of damaging the high power lens when it hits the slide. The fine adjustment only moves the tube a teeny tiny bit and very slowly so you don't have a great of a risk of damaging the slide or lens. The fine adjustment also helps to focus slowly so you don't miss the object you're trying to see.
Because if you use coarse adjustment, the body tube of the microscope (the part that moves up and down when you turn the knobs) will hit the microscope slide and cause the slide to break/crack. It moves the tube very quickly . You also run the risk of damaging the high power lens when it hits the slide. The fine adjustment only moves the tube a teeny tiny bit and very slowly so you don't have a great of a risk of damaging the slide or lens. The fine adjustment also helps to focus slowly so you don't miss the object you're trying to see.