Want this question answered?
The course adjustment moves the stage of the microscope further/closer away from the objective lens (it is used for general focusing), and the fine adjustment moves the objective lens very small distances for finer focusing.
use the fine adjustment knob to get a better view of what you are looking at.For low power you can use the coarse adjustment and fine adjustmentfor high power you should only use the fine adjustment because on high power, the objective lens is too close to the slide and using the coarse adjustment may scratch the objective lens.
Which of the following is a correct procedure for the operation of a microscope? First, put the specimen into focus using a low power lens, then switch to a lower power lens if needed.Remove and add slides while the high power lens is selected.First, put the specimen into focus using a low power lens, then switch to a higher power lens if needed.Use the fine focus knob with the low power lens and use the coarse focus knob with the high power lens
A microscope is a scientific instrument with one or more lenses that enhances the view of smaller objects, for example, microorganisms (bacteria) and microsopic materials, which are too small to be seen with the naked eye. The eyepiece lens and objective lenses able to zoom in and out to enlarge and observe the specimens more clearly, with the objective lenses having a much better zoom-in ability. The eyepiece lens is at the top where you look into to observe the specimen. There are usually 3 or 4 objective lenses on a microscope held by a revolving nosepiece/turret, consisting of different times of zoom-in, e.g. 40x, 100x, 400x.... Also, there is a fine focus knob and a coarse focus knob. The coarse focus is for moving the objective lenses nearer/further away from the specimen while the fine focus is for fine-tuning the focus (usually when it is unclear). Use the coarse focus before the fine focus unless there is no need to zoom in on the specimen. Finally, an illuminator might shine a light on the specimen so that you can see it more easily.
when you carrying a microscope you should use your hands
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 function of a microscope's coarse adjustment knob is to improve focus on the object under study by adjusting the lens. Unlike the fine adjustment, coarse adjustment moves the lenses quickly.
Two things you can do is to use 1) The fine adjustment knob 2) The coarse adjestment knob
Use a coarse adjustment knob (large movement) to get near, then use the fine adjustment knob (small movement) to fine-tune.
You may easily break or crush the slide.
You MUST use the coarse focus knob.
On a the microscope I use, the ocular (eyepiece) has a magnification power of 10x. The 'low' (or 'scanning') objective lens is 4x, the 'medium' has a power of 10x, and the 'high' has a power of 40x. Multiply the ocular by the lens you're using to get your 'total magnification.' TIP: Only use the coarse adjustment knob while on 'low' power, then use the fine adjustment. Why? If you use the coarse adjustment knob on 'medium' or 'high,' there's a good chance you'll crack your slide. -BugCrunch
I assume you would use the fine adjustment knob for high power objectives.
There are two knobs. The "coarse focus" knob changes the focal length very quickly, so you use that to get a close to sharp image. Then, you use the "fine focus" knob to perfect the image. Both knobs do the same thing, just at different rates. Resource: http://shs.westport.k12.ct.us/mjvl/biology/microscope/microscope.htm
Assuming that you were talking about a microscope, then . . . the fine adjustment is really the normal adjustment. It's easy to use to get a great focus because it moves the focusing mechanism very little per turn. On the other hand, the fine adjustment simply won't get you close to initial focus without spending a day or two turning the dern thing. On the other hand, the COARSE focusing knob will get you NEARLY to correct focus in a flash.
It sets or adjusts the coarse of a speciment in a microscope.