Question

What two structures on the microscope are used to focus the specimen.

Answer 1

The fine focusing knob (wheel) and the coarse focusing knob (wheel).

Step-by-step explanation:

Thats it. Happy to help. Coarse focusing knob has more dramatic changes in focusing whereas fine focusing knob can focus the finer details. Helpful?

Answer 2

Iris Diaphragm controls the amount of light reaching the specimen. It is located above the condenser and below the stage. Most high quality microscopes include an Abbe condenser with an iris diaphragm. Combined, they control both the focus and quantity of light applied to the specimen.

Step-by-step explanation: