The object on the viewing stage is close to the lens of a microscope. Racking downward risks the lens touching the object and damaging either the object itself or the lens. Before moving the lens down, make sure you can see the lens and the object from the side of the microscope to void the two touching each other.
Focusing, its called a focusing knob.
coarse adjustment
the coarse adjustment
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a good way that works for me is use the coarse adjustment till you can start to see something then use the fine adjustment to get it into focus.
Focusing, its called a focusing knob.
It is the less precise focusing knob on a microscope.
the coarse adjustment
coarse adjustment
the coarse adjustment
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.
On a light microscope there is the coarse adjustment knob and the fine adjustment knob
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The coarse-adjustment knob moves the body tube up and down to allow focusing of the image.
The coarse-adjustment knob moves the body tube up and down to allow focusing of the image.
The coarse-adjustment knob moves the body tube up and down to allow focusing of the image.
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.