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Definitions of the Parts of the Microscope

- page 1 - Definitions of the Parts of the Microscope Heather KroeningMay 2001 Arm - The arm of the Microscope supports the body tube. Body Tube - The body tube is a hollow tube through which light travels from the objective to the ocular. It contains a prism at the base of the tube that bends the light rays so they can enter the inclined tube. Coarse Adjustment Knob - The coarse adjustment knob located on the arm of the Microscope moves the stage up and down to bring the specimen into focus. The gearing mechanism of the adjustment produces a large vertical movement of the stage with only a partial revolution of the knob. Because of this, the coarse adjustment should only be used with low power (4X and 10X objectives) and never with the high power lenses (40X and 100X). Condenser Diaphragm - This diaphragm controls the amount of light entering the lens system.

microscope moves the stage up and down to bring the specimen into focus. The gearing mechanism of the adjustment produces a large vertical movement of the stage with only a partial revolution of the knob. Because of this, the coarse adjustment should only be used with low power (4X and 10X objectives) and never with the high power lenses (40X and

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