MICROANATOMY

Detailed explanation-1: -The fine-adjustment knob on a light microscope focuses by moving the lens slowly and is used to focus on the specimen more clearly. It is used with the high-power objective lenses. The course-adjustment knob focuses by moving the lens quickly and is used to find the specimen your are observing.

Detailed explanation-2: -Coarse and fine adjustment The coarse adjustment knob should only be used with the lowest power objective lens. Once it is in focus, you will only need to use the fine focus. Using the coarse focus with higher lenses may result in crashing the lens into the slide.

Detailed explanation-3: -Answer and Explanation: If a student uses the coarse focus knob when the 10X (yellow) and 40X (blue) objectives are in place the student will definitely lose the view of the object being served and may damage the lens or sample.