81. What should be the focal
lengths of the lenses used in
the astronomical telescope?
82. What happens when the
objective and the eyepiece of a
telescope are interchanged?
83. What is the
advantage of an
astronomical telescope
with image at Near Point
(Least Distance of
Distinct Vision) than
that forming image at
infinity?
84. What are the
advantages and
disadvantages of a
terrestrial
telescope over
astronomical
telescope?
85. Why is a
binocular used
though there is
a telescope
which has the
same purpose?
86. What are
the main
advantages
of a
Galilean
Telescope
over the
Astronomical
and
Terrestrial
Telescopes?
