It is desired to magnify reading material by a factor of m

It is desired to magnify reading material by a factor of m = 2.2 × when a book is placed 9.6 cmbehind a lens.

A.) Describe the type of image would be?

virtual, real, upright, upleft, magnified, demagnified

B.) Determine the magnification of the final image formed.

Solution

The type of image is upright

m = -di / do

-di / 9.6 = 2.2

di = -21.12 cm

1/f = 1/do + 1/di = 1/9.6 + (-1/21.12)

f = 17.6 cm

power = 1 / 17.6 cm = 5.68 D