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Q: Which focusing knob do you use with 10x and 40x?
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Why should you use the fine focus knob only when working with the 40x objective lens?

The fine focus knob should be used only with the 40x objective lens because this lens has a narrow depth of field which requires precise adjustments to bring the specimen into focus. Using the fine focus knob with other objective lenses may cause damage to the lens or slide due to the rapid movement of the focusing mechanism.


Calculate the magnification of a microscope that has a 8x eye piece and 10x and 40x objectives?

To calculate the total magnification of a microscope, you multiply the magnification of the eyepiece by the magnification of the objective lens in use. For the 10x objective, the total magnification would be 8x (eyepiece) * 10x (objective) = 80x. For the 40x objective, the total magnification would be 8x (eyepiece) * 40x (objective) = 320x.


When focusing the object under low power which focus knob do you use first?

When focusing the object under low power, you should use the coarse focus knob first to bring the object into general focus. Once the object is roughly in focus, then you can use the fine focus knob to sharpen the image.


What is the use of the focusing knob on a microscope?

The focusing knob on a microscope is used to adjust the distance between the objective lens and the specimen being observed. By turning the focusing knob, you can bring different parts of the specimen into sharp focus, allowing for clearer observation and analysis.


What are the degree of magnifications of microscope objectives?

Microscope objective lenses typically have magnification levels ranging from 4x to 100x. The magnification power is usually marked on the objective lens itself. Higher magnifications require the use of immersion oil to achieve clearer images.


Which objective should the coarse focus knob be used?

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.


What is the name of the adjustment knob that moves the body tube for focusing with the high-power objective lens?

The adjustment knob that moves the body tube for focusing with the high-power objective lens is called the fine focus adjustment knob. It allows for precise adjustments to bring the specimen into sharp focus at high magnifications.


Why should you never use a course adjustment knob on High power?

Using the course adjustment knob on high power can cause the microscope to move too quickly, potentially damaging the specimen or the objective lens. It is better to use the fine adjustment knob on high power for precise focusing.


How do you find the total magnifying power of a microscope?

To find the total magnifying power of a microscope, you multiply the magnification of the eyepiece by the magnification of the objective lens. For example, if the eyepiece has a magnification of 10x and the objective lens has a magnification of 40x, the total magnifying power would be 10x * 40x = 400x.


Which focusing knob do you never use under high power?

You should avoid using the coarse focusing knob under high power magnification as it moves the microscope stage too quickly, making it difficult to focus accurately. It is best to only use the fine focusing knob to make precise adjustments when working with high power objectives.


What is the use of the coarse adjustment knob?

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.


What two structures on the microscope will you use to focus on your specimen?

To focus on a specimen using a microscope, you will typically use the coarse adjustment knob for initial focusing and the fine adjustment knob for precise focusing. The coarse adjustment knob moves the stage up and down quickly to bring the specimen into view, while the fine adjustment knob allows for small, precise adjustments to achieve a clear image.