The knob may break.
high-power lens
The coarse objective knob when turned downward will cause the microscope lens to crush into the test slide
waddup
Move both gram weights to zero and balance it out by using the knob.
First of all, one should never call it high power, it is morecommonly called the "high objective", yet that is not what this question is asking. To answer the question: You use the fine adjustment knob. This knob should be located near the coarse adjustment knob, on the opposite side of the microscope (at the same height as the coarse adjustment knob), or even as a separate knob protruding from the coarse adjustment knob. The fine adjustment knob is smaller in size. You should never, ever use the coarse adjustment knob under the high objective, you could scratch the microscope slide, cover slip, high objective lens, or in a worst case scenario break the high objective lens.
high-power lens
The coarse objective knob when turned downward will cause the microscope lens to crush into the test slide
waddup
The coarse adjustment knob should never be used when viewing in high power with a compound microscope. When in high power, use the coarse adjustment (the knob smaller than the coarse adj.) to more accurately focus on the subject.
Move both gram weights to zero and balance it out by using the knob.
You should not use the coarse adjustment knob when you can see a blurred silhouette of your object. Then you use the Fine adjustment knob to zoom in on it for a sharper image.
First of all, one should never call it high power, it is morecommonly called the "high objective", yet that is not what this question is asking. To answer the question: You use the fine adjustment knob. This knob should be located near the coarse adjustment knob, on the opposite side of the microscope (at the same height as the coarse adjustment knob), or even as a separate knob protruding from the coarse adjustment knob. The fine adjustment knob is smaller in size. You should never, ever use the coarse adjustment knob under the high objective, you could scratch the microscope slide, cover slip, high objective lens, or in a worst case scenario break the high objective lens.
depends. if the definition is like a door knob, than it would be knob. ive never heard of "nob" though.
This is the coarse adjustment knob. This should be used before the fine adjustment knob (the smaller knob) - which is for fine focusing.
pan, beam, base, adjustment knob , rider, pointer
You should find the 'adjustment knob'.
under the knob, there should be a locking nut on the shift rod. Loosen this and the knob should just unscrew