INTRODUCTION TO MICROSCOPY CELL BIOLOGY
LIGHT MICROSCOPY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It can be used to focus the image at all magnifications.
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It is used to focus the image when the 40x objective lens is used.
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It moves the stage up and down for focusing.
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It sharpens the image only slightly when turned.
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Detailed explanation-1: -Answer: 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.
Detailed explanation-2: -The microscope stage can be raised and lowered more quickly with coarse adjustment by turning the coarse adjustment knobs. The smaller knobs, called fine adjustment knobs, are similarly used to adjust the stage, but at stronger magnifications, they do so more gradually and with better control.
Detailed explanation-3: -Rotate the coarse adjustment knob in a clockwise direction to bring the 10X objective closer to the slide. View through the eyepieces and, without disturbing the coarse adjustment setting, slowly rotate the fine adjustment knob until the specimen is in the sharpest possible focus.