What's one reason why we typically only use the fine-focus knob for higher (40x, 100x) power objectives?
A. If we used the coarse-focus knob, we might break the cover slide
B. The coarse-focus knob is deactivated on the higher power objectives
C. The fine-focus knob allows us to better focus the light coming through the front condenser lens, so we get a sharper image in the higher objectives
D. There is no other knob to use
Answer:A
What's one reason why we typically only use the fine-focus knob for higher (40x, 100x) power objectives?
A. If we used the coarse-focus knob, we might break the cover slide B. The coarse-focus knob is deactivated on the higher power objectives C. The fine-focus knob allows us to better focus the light coming through the front condenser lens, so we get a sharper image in the higher objectives D. There is no other knob to use