Multiple Choice
Why is immersion oil often used when viewing specimens under a microscope?
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5. Cell Components
Microscopes
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How do you adjust the focus of the microscope when observing organisms at high magnifications?
A
Use the fine focus knob
B
Adjust the stage height
C
Use the coarse focus knob
D
Change the objective lens
Verified step by step guidance1
Begin by ensuring the microscope is set up correctly with the slide securely placed on the stage.
Select the appropriate objective lens for high magnification. Typically, this will be the highest power lens available on your microscope.
Use the coarse focus knob initially to bring the specimen into general focus. This is done at lower magnifications to avoid damaging the slide or lens.
Once the specimen is roughly in focus, switch to the fine focus knob. This knob allows for precise adjustments and is essential for achieving a clear image at high magnifications.
Adjust the stage height if necessary to ensure the specimen is centered and properly illuminated, but primarily rely on the fine focus knob for clarity.
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