Question Detail
Question
After increasing magnification with a higher power objective lens, which knob is primarily used to sharpen the image?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Step 5 of 'How to Use a Light Microscope' instructs: 'Rotate the nosepiece to select a higher power objective lens and use the fine focus knob to sharpen the image.' The coarse focus knob is typically used for initial focus at lower magnifications.
Hint
This knob provides precise adjustments for clarity, especially at higher magnifications.