The latter is the ratio of the angular size of the object
(which is equal to the angular size of the image even if the image
is magnified) to the angular size of the object if placed at the near
point (25 cm) Thus, magnification magnitude is |(v/u)| and
magnifying power is (25/ |u|) Only when the image is located at
the near point |v| = 25 cm, are the two quantities equal 9