,
v = – 90 cm,
Magnitude of magnification = 90/9 = 10 Each square in the virtual image  has an area 10 × 10 × 1 mm2
= 100 mm2 = 1 cm2
(b)
Magnifying power = 25/9 = 2 8
(c)
No, magnification of an image by a lens and angular magnification
(or magnifying power) of an optical instrument are two separate
things 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)