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You should use the lowest value lens. It is the shortest one.
ocular lens
Today's microscopes use convex lenses.
A microscope that has more than one lens is a compound microscope
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 should use the lowest value lens. It is the shortest one.
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.
When viewing a specimen, you must always use the lower power objective lenses first. Low power lens gives the widest field of view and makes it easier to find the specimen when you look through the microscope. Finding the specimen at high power, without first centering it in the field of view at low power, is nearly impossible.
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
On a microscope with the usual 3-lens turret it is usual to use the objective lens with the lowest magnification to first examine your specimen. This gives a wider overall view of the subject, and will allow you to choose the particular detail that best suits your study. You may then move on to a higher magnification, if necessary, to study finer detail. If you started with the highest magnification, your fine focus will be uncertain, and you risk the front of the objective lens coming into contact with the sample slide. This could damage your specimen, and may damage the front of the lens.
The scientist examined the specimen under the microscope.
Coverslip is not placed on a microscope but on the stained specimen on slide . This protects objective lens of microscope from getting stain from a wet mount . It also protects permanent slide .
ocular lens
microscope
A microscope slide is the commonest instrument in any Biology laboratory. It is a transparent rectangular glass apparatus and it fits underneath the lens piece of the microscope. It is used for mounting smears of body secretions, microscopic specimen of bacteria, viruses, fungi or parasites. One can stain the specimen they want to observe and focus the microscope on it. A cover slip is placed on top of the slide in order to keep the specimen in place. One can use a microscope slide in order to draw blood films as well.
A microscope slide is the commonest instrument in any Biology laboratory. It is a transparent rectangular glass apparatus and it fits underneath the lens piece of the microscope. It is used for mounting smears of body secretions, microscopic specimen of bacteria, viruses, fungi or parasites. One can stain the specimen they want to observe and focus the microscope on it. A cover slip is placed on top of the slide in order to keep the specimen in place. One can use a microscope slide in order to draw blood films as well.
Electron Microscope