Question

which parts of this compound light microscope with clean lenses should be used to improve the quality of the image being observed in the high - power field of view? 1 ocular and high - power objective 2 diaphragm and fine - adjustment knob 3 coarse - adjustment knob and low power objective 4 ocular and diaphragm

Explanation:

• Diaphragm: Controls the amount of light reaching the specimen. In high - power view, adjusting the diaphragm can optimize the contrast and brightness of the image.
• Fine - adjustment knob: Used for precise focusing in high - power magnification. The coarse - adjustment knob is too “rough” and can easily move the stage too much, potentially crashing the objective into the slide or blurring the image beyond quick recovery in high - power.

Answer:

1. diaphragm and fine - adjustment knob