객관식
When you observe crossed threads under a microscope, what does this allow you to determine?
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9. Microscopes
Introduction to Microscopes
객관식
Which of the following lists the correct order of steps for bringing an object into focus under high power on a compound light microscope?
A
Start with low power, use coarse adjustment, switch to high power, use fine adjustment
B
Start with high power, use fine adjustment, switch to low power, use coarse adjustment
C
Start with low power, use fine adjustment, switch to high power, use coarse adjustment
D
Start with high power, use coarse adjustment, switch to low power, use fine adjustment
검증된 단계별 안내1
Step 1: Begin by placing the microscope slide on the stage and selecting the low power objective lens. This provides a wider field of view and makes it easier to locate the specimen.
Step 2: Use the coarse adjustment knob to bring the specimen roughly into focus under low power. The coarse adjustment moves the stage or objective lens quickly and over a larger distance.
Step 3: Once the specimen is in focus under low power, switch to the high power objective lens carefully without moving the stage significantly to avoid losing the specimen.
Step 4: Use the fine adjustment knob to sharpen the focus under high power. The fine adjustment moves the stage or lens very slightly for precise focusing.
Step 5: Avoid using the coarse adjustment under high power to prevent damaging the slide or the objective lens, as the working distance is very small at high magnification.
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