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it is the COURSE adjustment knob
The course adjustment moves the stage of the microscope further/closer away from the objective lens (it is used for general focusing), and the fine adjustment moves the objective lens very small distances for finer focusing.
it is the course focus
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The coarse adjustment knob is a component of a microscope. It is used to lower or raise the stage of the microscope in order to focus the specimen.
Course adjustment
The function of the coarse adjustment knob on a microscope is to lower or raise the stage of the microscope. This mechanism is used to focus the specimen.
The course adjustment knob raises and lowers the stage of the microscope. This knob is mainly used on the scanning and low power knob to simply find the specimen. When trying to focus directly, use the fine adjustment knob.
microscope
The difference is in the gearing of the knobs. A big movement of the fine knob is equivalent to a small movement of the coarse knob.
it is how you operate the microscope just adjust he course adjustment knob for focusing the fine adjustment knob
it is the COURSE adjustment knob
using the course adjustment to focus the specimen under high power
For course focusing the primary stage is used.
The difference between a cold and a bus driver is a bus driver has a course to run and a cold has to run its course.
The course adjustment moves the stage of the microscope further/closer away from the objective lens (it is used for general focusing), and the fine adjustment moves the objective lens very small distances for finer focusing.