21 inches
The focus knob is turned to adjust the focus and get a clear image of the specimen under the microscope. Turning the focus knob moves the lenses up and down to bring the specimen into sharp focus.
Focusing a specimen under low power objective (LPO) allows you to find and center the specimen on the slide before moving to higher magnifications. This ensures that the sample is in the field of view and helps in adjusting the focus and moving to higher magnifications without losing sight of the specimen.
When you see a specimen clearly down a microscope, it is referred to as having a "clear or sharp focus" where the details of the specimen are in clear view. This indicates that the specimen is properly in focus under the microscope, allowing for accurate examination and observation.
Dropping the microscope or mishandling it can lead to damage, as well as using excessive force when adjusting the focus or moving the slides. Using improper cleaning methods or harsh chemicals can also damage the microscope and specimen.
the fine focus is used to get your specimen in clear sight you can move it very very slowly to do this
To view a specimen under high power on a microscope, first ensure the specimen is properly mounted on a slide and in focus under low magnification. Then, increase the magnification to high power, typically 400x or higher, using the lens adjustment knob without contacting the slide. Finally, fine-tune the focus using the fine focus knob to get a clear view of the specimen at high magnification.
When using a specimen microscope, it is important to bring the specimen into focus by adjusting the focus knob until the specimen appears clear and sharp under the objective lens. You may also need to adjust the light intensity and diaphragm to enhance the contrast and visibility of the specimen. Additionally, ensure that the slide is clean and free of any debris that may obstruct the view.
When viewing a specimen under the microscope, you should always start with the lowest magnification objective lens. This allows you to locate and focus on the specimen before moving to higher magnifications for a closer look.
low power objective lens to locate and focus on the specimen before moving to higher magnifications.
It means you have a good microscope.
The fine adjustment knob should be used to focus the image while absorbing a specimen under medium power. The fine adjustment knob allows for precise focusing by making small adjustments to the focus point.
The low power objective lens in a light microscope is manipulated by rotating the nosepiece to engage the correct lens. Then, use the coarse focus knob to move the objective lens close to the specimen until it is in focus. Finally, use the fine focus knob to fine-tune the focus for a clear view of the specimen.