An object is located to the left of a concave lens whose focal length is -34 cm. The magnification produced by the lens is m = 1/3. (a) To decrease the magnification to m 1/4, should the object be moved closer to the lens or farther away? (b) Calculate the distance through which the object should be moved. =

A lab technician with a near point of 27 cm is viewing a specimen with a compound microscope that has a barrel length of 16.6 cm and an eyepiece that has a focal length of 1.5 cm. Determine the focal length the objective must have so that the overall magnification of the microscope will be -291. cm

Is this question set up wrong?  I think the statement "The magnification of a book held 7.50 cm from a 10.0 cm-focal length lens is 3.00." is impossible using the lens equation 1/do + 1/di = 1/f and the equation for magnification m = -di / do.

An object is in front of a converging lens (f = 0.35 m). The magnification of the lens is m = 2.5. (a) Relative to the lens, in what direction should the object be moved so that the magnification changes to m = -2.5? (b) Through what distance should the object be moved? (a) (b) Number i eTextbook and Media Save for Later Attempts: 0 of 5 used Units Submit Answer