44(b)]
Thus, the total magnification [(according to  Eq (9 33)], when the
image is formed at infinity, is
m
m m
fL
fD
o
e
o
e
=
=







                                                                    (9 45)
Clearly, to achieve a large magnification of a small object (hence the
name microscope), the objective and eyepiece should have small focal
lengths