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An object is located to the left of a convex lens whose focal length is f=34...

An object is located to the left of a convex lens whose focal length is f=34 cm.
The magnification (m) produced by the lens is 4.0. Find an expression for
magnification in terms of “f” and object distance (do). To increase the magnification to
5.0, calculate the distance through which the object should be moved. Also explain
your result with free hand ray diagram. At what position of the object the
magnification becomes infinity?
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