high-power lens
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.
The coarse objective knob when turned downward will cause the microscope lens to crush into the test slide
Oculars are generally 10x, so I assume you're talking of the 40x objective (10x40=400, how total magnification is derived). The most important rule is NEVER touch the coarse focus adjustment, only the fine; you run the risk of breaking the specimen or the objective if you mash the two together. Other things to consider- high light level, make sure koehler illumination is established and adjust your field aperture to eliminate refringence.
Never visible to naked eye.Visible to light microscope during cell division
This is a euglena, a type of protist. I have never heard of a euglena oval but under a microscope, euglena have an oval shape within them.
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.
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.
The coarse objective knob when turned downward will cause the microscope lens to crush into the test slide
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.
Because the movement is too large and you can break the slide of you turn it the wrong way.
The coarse adjustment knob may move the lens too far too fast and the slide may crack and/or the object be squashed. Using the fine adjustment lens will bring the object into focus much more accurately. In addition, the coarse adjustment knob adjusts in too great a quantity. The fine is less responsive so its easier to adjust at high magnification.
The coarse adjustment because it moves the objective much farther than the fine adjustment knob, and you could hit the slide with the objective and damage the lens and/or the slide.
The object on the viewing stage is close to the lens of a microscope. Racking downward risks the lens touching the object and damaging either the object itself or the lens. Before moving the lens down, make sure you can see the lens and the object from the side of the microscope to void the two touching each other.
is it you shouldn't touch chemicals with your hands
Yes Of Coarse ....
There can never be an answer. But probably blonde.
Oculars are generally 10x, so I assume you're talking of the 40x objective (10x40=400, how total magnification is derived). The most important rule is NEVER touch the coarse focus adjustment, only the fine; you run the risk of breaking the specimen or the objective if you mash the two together. Other things to consider- high light level, make sure koehler illumination is established and adjust your field aperture to eliminate refringence.