Question

fill in the blank question
bright - field microscopes typically have two focus knobs, the
focus adjustment knob and the
focus adjustment knob.
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Explanation:

Bright-field microscopes have two focus knobs: the coarse focus adjustment knob, which moves the stage (or objective lens) significantly to bring the specimen into general focus, and the fine focus adjustment knob, which makes small, precise adjustments to achieve sharp, detailed focus.

Answer:

1. coarse
2. fine