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In Social Studies / Middle School | 2014-05-22

What is the difference between a fine focus knob and a coarse focus knob?

Asked by Rehnuma123

Answer (2)

The difference between a fine focus and coarse focus knob in a light microscope is related to the scale of movements each knob makes. The coarse focusing knob is used for large-scale movements when using lower magnification objective lenses (4x and 10x), while the fine focusing knob is used for small-scale movements especially with higher magnification objective lenses (40x or 100x). The coarse focus knob is used to roughly focus the specimen, and once focused, the fine focus knob is used to make minor adjustments to achieve a crisp image.

Answered by QWCyan | 2024-06-19

The coarse focus knob is used for large adjustments when first viewing a specimen, while the fine focus knob is for making precise, small adjustments for clarity. Generally, the coarse focus knob is used on lower magnifications, while the fine focus knob is essential for higher magnifications. Using both knobs correctly allows for effective focusing on microscope slides.
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Answered by QWCyan | 2024-09-30

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