Question

1. what does the coarse focus knob do? it fine-tunes the image it adjusts the light intensity it raises or lowers the stage dramatically it moves the slide around on the stage

Explanation:

To determine the function of the coarse focus knob, we analyze each option:

• "It fine - tunes the image" is the function of the fine focus knob, not the coarse one.
• "It adjusts the light intensity" is the function of the light adjustment controls (like the diaphragm or rheostat), not the coarse focus knob.
• "It raises or lowers the stage dramatically" is the correct function of the coarse focus knob. It is used for making large - scale adjustments to the stage height to get the specimen roughly in focus.
• "It moves the slide around on the stage" is the function of the stage controls (like the stage clips and the stage adjustment knobs for moving the slide), not the coarse focus knob.

Answer:

C. It raises or lowers the stage dramatically (assuming the third option is labeled C; if the options are labeled differently, adjust the label accordingly with the text "It raises or lowers the stage dramatically")