Respuesta :
The 2 that you will need to select are B and C.
B) The stage or objectives move very little when the knob is turned.
C) The objective will not move enough to risk breaking the glass slide.
Reasons for using only the fine-focus knob under high power are:-
- The stage or objectives move very little when the knob is turned.
- The objective will not move enough to risk breaking the glass slide.
What does fine focus knob do?
- A slow but precise control used to fine focus the image when viewing at the higher magnifications.
- The smaller knob on each side of the microscope .
- This knob is used to bring an object into fine and final focus.
- Fine adjustment knobs used to raise and lower the stage but more slowly and in a more controlled manner under higher magnifications.
What is microscope?
- Microscope, instrument that produces enlarged images of small objects, allowing the observer an exceedingly close view of minute structures at a scale convenient for examination and analysis.
- The microscope may provide a dynamic image as with conventional optical instruments or one that is static as with conventional scanning electron microscopes.
To know more about magnification here
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