That is the oil lens. For suspension of microbes in an oil solution in which the objective lens is also immersed. Improves resolution.
If you are using the oil immersion objective on a microscope, you must use oil to increase the resolution of the lens. These lens are used at very high magnification.
microscope
A compound microscope has two lenses: the objective lens and the eyepiece lens. The objective lens is used to gather light from the specimen and create a magnified image, which is further magnified by the eyepiece lens for viewing.
An ocular lens is the top part of a microscope it is the eyepiece that you look through. The ocular lens is there it magnify whatever if being viewed. It can be different strengths base on the size power of the lens.
Answersimple first one is: their both different in quality. For example, a light microscope would use sunlight as its source of power,and therefore less effective. Compound microscope use electricity as its source of power for the same usage, which would be stronger and better to see the details in the specimen.
You do not use the coarse focus knob on high power because it can damage the slide and the objective lens of the microscope. Use only the fine focus knob to bring the specimen into sharp focus on high power.
You use the low power lens to find the specimen with a microscope. Once you have found the specimen on low power, you can switch to high power for greater magnification. Just be sure to use only the fine adjustment knobs for focusing on high power so the high power objective won't hit the slide.
No, cleaning a microscope lens with any soft tissue is not recommended. It is best to use lens cleaning paper or a lens cloth specifically designed for cleaning optics to avoid scratching or damaging the lens.
The first step to clean a microscope lens is to take some lens cleaning paper that you can find in specialty shops or distributors of laboratory equipment. Alternatively, use certified cotton. Never touch the microscope lens with your fingertips since fingerprints can affect the microscope's visibility.
microscopes use the lens
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.
If you are using the oil immersion objective on a microscope, you must use oil to increase the resolution of the lens. These lens are used at very high magnification.
Storing a microscope with the low power objective lens in place helps protect the lens and prevents accidental damage or contamination during storage. The low power lens is less delicate compared to other high-power lenses, making it a safer option for storage to ensure the microscope remains in good condition for future use.
To make the image clearer on a microscope you can use the focusing 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
For low power you can use the coarse adjustment and fine adjustment for 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.
A microscope that has more than one lens is a compound microscope