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The numerical aperture of a microscope objective defines the objective's resolution. Each microscope objective has a minimum and maximum magnification necessary for the details in an image to be resolved. A simple formula for the minimum value is (500 x NA). And for the maximum magnification (1000 x NA).
What microscope does not use light in forming the specimen image? This is the electron microscope, which uses a beam of electrons instead of light. Electrons have a much shorter wavelength than visible light so they can separate points which â¦ are closer together than the light microscope can ie they have a better resolution and so can see more detail.