LIFE SCIENCE

Detailed explanation-1: -Fine adjustment knobs are used for sharpening the image of the specimen after it is focused. Coarse and fine adjustments, achieved through knobs, help in focussing the image. The fine adjustment knob is the smaller of the two knobs and is located inside the coarse adjustment knob.

Detailed explanation-2: -The microscope’s fine adjustment knob makes fine adjustments to the focus. We first use the coarse adjustment knob to perform significant stage position adjustments before focusing on an object. The object is then brought into focus by turning the fine adjustment knob as we move the stage closer to the target.