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The coarse adjustment knob is only used with the low-power objective lens (usually 4x) because all the other ones are too long and the coarse adjustment knob may bring the slide up too qucikly, therefore it might break the slide or crush the specimen being observed.
When using the medium (10x) and high (40x) power objective lens, it is best to use the fine adjustment knob to focus on the details instead.
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∙ 13y ago
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Why should you never turn the coarse objective knob downward?
The coarse objective knob when turned downward will cause the microscope lens to crush into the test slide
What part of the microscope should you used to focus the image when using high power objective 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.
What knob controls the adjustments of focus?
it could be either coarse or fine knob. coarse knob is used to focus image at higher magnification, while fine knob is used to focus on lower magnification
When do you use fine focus and the coarse focus knobs?
The fine focus knob is used to bring an object into fine focus, while the course focus knob is used to bring an object into approximate focus. The course focus knob should only be used on the low-power and scanning objectives of the light microscope. Using it on the high power microscope is okay, but you should be very careful. It is no recommended to use the course adjustment knob on the oil-emersion objective as it is so close to the stage and could lead to a potential break in the slide. Fine focus adjustment knob is useful to bring out the fine details in the specimen on your slide. Can be used on any of the objectives, but most receptive on the high-power and oil-emersion objectives.
Why must the distance from slide to objective lens increase rather than decrease when coarse focusing with the scannin and low power objectives?
According to my neurons that the distance from slide to objective lens should be increase rather than decrease when coarse focusing with the scanner and LPO to obtain a clearer and more focus structure of a certain specimen.. U must ensure that the coarse adjustment knob is at it's extent and then turn on the fine adjustment knob clockwise for the easier visibility of the specimen =)) - VALERIC ACID ...sPCUTE ..=)
What objective brings a specimen into focus using a microscope?
coarse sdjustment knob
Turning which knob moves the objective lenses the greatest vertical distance?
coarse focus. This was by Joseph, hi R.C.S
Why should you never turn the coarse objective knob downward?
The coarse objective knob when turned downward will cause the microscope lens to crush into the test slide
Which focus knob should you use first when looking at a specimen?
You MUST use the coarse focus knob.
What part of the microscope should you used to focus the image when using high power objective 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.
What are the steps used to focus a microscope on high power?
First focus the microscope on the lowest objective using first the coarse djustment knob and then the fine adjustment knob. Once you have it in focus, move on and do the same for the next highest objective. Continue this process until you reach the highest objective and focus it in the same fashion.
What knob controls the adjustments of focus?
it could be either coarse or fine knob. coarse knob is used to focus image at higher magnification, while fine knob is used to focus on lower magnification
Why should you use the fine focus knob only when working with the 40x objective lens?
You should have already used the Coarse adjustment on 10x so when you switch to 40x, all you need to do is fine adjust it. Plus, you don't want to break it by turning the Coarse up all the way.
When using the high power objective which focus knob do you use?
The fine adjustment knob is used with the power objective on the microscope. Since the objective is already at the highest objective possible for that microscope, using the coarse adjustment knob would focus to much on the object making the details harder to read. Using the fine adjustment knob, you are able to see the fine details within the object or organism you are studying. The higher the power, the finer the knob and the lower the objective, the coarser the knob and objective.
When using a microscope what should the slide be placed on for viewing?
Ideally, the microscope should be returned to its lowest-magnification objective when the user finishes his or her work. Because not all users abide by this unwritten law, it's best-practice to use the "Fine Focus" knob (the smaller diameter of the two, usually farthest from the body of the scope) when first sitting at a microscope you don't own. This will prevent the sample from breaking because you've accidentally moved the stage (the moveable, horizontal part of the microscope on which your specimen sits) too rapidly after the last use took off, leaving the objective at 40x (400x total magnification in most instances). If you verify that the objective turret is set such that the lowest magnification objective is in place, you can usually safely use the larger knob located closer to the body of the 'scope (but on the same axis as the fine knob) to bring your sample into focus. As you move to higher powers, the fine is all the adjustment you should need. COARSE, you didn't even end up answering the question previous writter! seriously!!!!! i agree with you 2nd writer!!!!
What is the function of the coarse focus knob of the microscope?
To focus the image of the specimen
What is the part of a microscope brings objects into a rapid but coarse focus?
coarse adjustment knob
