INTRODUCTION
MICROSCOPE PARTS MAGNIFICATION RESOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Focusing a slide under high power with the coarse adjustment knob.
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Focusing a slide under low power with the coarse adjustment knob
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Carrying the microscope by the base and body tube
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Focusing a slide by moving the diaphragm
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Detailed explanation-1: -5. Coarse and fine adjustment The coarse adjustment knob should only be used with the lowest power objective lens. Once it is in focus, you will only need to use the fine focus. Using the coarse focus with higher lenses may result in crashing the lens into the slide.
Detailed explanation-2: -If a student uses the coarse focus knob when the 10X (yellow) and 40X (blue) objectives are in place the student will definitely lose the view of the object being served and may damage the lens or sample.
Detailed explanation-3: -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.
Detailed explanation-4: -The coarse adjustment knob is used ONLY with the low power (4X, 10X) objectives. When focusing under the 40X or 100X objective, ONLY use the fine adjustment, never the coarse adjustment.
Detailed explanation-5: -Never use the coarse focusing knob, when you are using high power, because you can easily crunch the objective through the slide-a costly mistake. Always begin the process at low power and then raise the magnification of the objective lenses.