It depends on what the specimen is. If for example - the specimen is a person's finger-print, then low magnification is sufficient. However - if the specimen is a sample of blood, a higher magnification would be needed to show individual blood cells.
high lens
In a light microscope magnification is varied by using different lenses to refract the light. In an electron microscope magnification is varied by altering the configurations of magnetic fields to bend the electron beam.
It depends on what magnification the ocular lens is (usually 10x), then you multiply that by the objective lens magnification (what you said to be 40x). So the microscope would magnify your specimen by 400 times.
The oil immersion lens or objective has power 90X-100X and an eyepiece lens generally in light microscope comes with 10X so total magnification of oil immersion lens is 100X10 = 1,000
When using a microscope, you are magnifying the area under the lens by however many times the magnification is on your lens. On low power the area expanded by the lens is smaller than on high magnification. When on low power more is visible and there is less area to search for your given object under the microscope. I recommend finding the object on low magnification, and then switching to high once you have found it.
multiply the magnification of the eyepiece by the magnification of the high objective lens. for example, if the eyepiece magnifies x10, and the high objective magnifies x40, then the total magnification would be 400x
---- You would use the light microscope. The electron microscope would be unnecessary in this situation, due to its high magnification levels.
high lens
High Power Objective
Microscopes vary in power. You can determine total magnification by the eyepiece and the lens.
highpowerobjective
you multyply the low powered objective and the high powered objective :)
The Dissecting Light Microscope range of magnification is 20x to 80x. The Compound Light Microscope ranges from 40x to 1000x -40x Scanning -100x Low Power -400x High Power -1000x Oil Immersion
In a light microscope magnification is varied by using different lenses to refract the light. In an electron microscope magnification is varied by altering the configurations of magnetic fields to bend the electron beam.
you multyply the low powered objective and the high powered objective :)
what magnification is ontained with the high power objective
The standard microscope is that the eyepiece is 10x magnification, and three types of powered magnification helps it magnify even more. Low power is 4x, Medium power is 10x, and High power is 40x. Eyepiece and Low power is 40x, Eyepiece and Medium power is 100x, and Eyepiece and High power is 400x magnification in revolance to the naked eye.