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In a microscope with an ocular magnification of 10 and an objective magnification of 20, the total magnification would be 200x. Magnification in Telescopes. The formula for total magnification of a telescope is the focal length of the objective lens divided by the focal length of the eyepiece lens.
Magnification. Magnification produced by a spherical mirror gives the relative extent to which the image of an object is magnified with respect to the object size. It is expressed as the ratio of the height of the image to the height of the object. It is usually represented by the letter m. If h is the height of the object and hâ² is the height of the image, then the magnification m produced by a spherical mirror is given by. The magnification m is also related to the object distance (u) and image distance (v). It can be expressed as: