the widest part
What you do first when you use a microscope you put the slide in. Then you focus the microscope. Then you look at the object you are supposed to or look at the object you want to.
To observe a skin cell at the highest magnification through a microscope, you should first place the skin cell slide on the microscope stage, focus the microscope using the coarse and fine focus knobs, adjust the light intensity, and then increase the magnification to the highest level possible on the microscope objective.
The lens that you should use to first look at a slide on a microscope is a low power lens then move on to a higher power for more clarity.
You can determine which hair is above the other on a microscope slide by adjusting the microscope's focus. The hair that comes into focus first is positioned closer to the objective lens and is therefore above the other hair on the slide. This difference in focus indicates the relative depth of field between the two hairs.
Because It Could Blind You
They enlarge and put into focus the object on the slide.
You always focus by moving the slide away from the microscope because if you focus towards the microscope you will break the slide since you can't see how close it is when you are looking through the eye piece.....it is very easy to break the slides and the focus wheel adjustment is essentially a geared lever and is much stronger than you think. By the time you realize the slide is touching the microscope it is too late...the slide will already be cracked/broken.
On a microscope, you have to make sure to use the fine focus instead of the coarse focus. If you are not careful and you do use the coarse focus, it will move the barrel down and the lens may crush your slide/slide cover. Which is very, very bad.
Inclining the microscope fully with a slide on the stage can lead to the objective lens or slide coming into contact, potentially causing damage to both. Additionally, there is a risk of the slide slipping or shifting out of position, affecting the focus and clarity of the sample being observed. It is recommended to be cautious and avoid fully inclining the microscope when a slide is on the stage to prevent any potential damage or disturbances to the slide or lens.
To examine a prepared slide using a microscope, first place the slide on the stage and secure it with the stage clips. Start with the lowest magnification objective lens, adjust the focus using the coarse adjustment knob, then fine-tune the focus with the fine adjustment knob. Once the image is in focus, you can adjust the magnification by rotating the nosepiece to switch to a higher magnification lens for detailed observation.
the coarse adjustment knob
I would suggest Manuel to first ensure the microscope is plugged in and turned on. Then, place a small drop of water containing his cheek cells on a microscope slide. Next, gently place the slide on the stage of the microscope and adjust the focus using the fine focus knob to view the cheek cells clearly.