Galilean Telescope
Galilean Telescope is useful to observe the distant objects
of space. It increases the visual angle therefore we can see the distant
objects clearly. Astronomical telescope is used to see the space objects. It is
also called as Galilean telescope. It has two lenses and the final image is an
inverted image. By adjusting the position of the eye lens, we can adjust the
final image either at the near point or at the far point.
In the case of the telescope, filed lens will have more focal
length than that of the eye lens.
As the long-distance object is taken into consideration for observation,
the object is not generally shown in the diagram. We can define the
magnification of a telescope as the ratio of focal length of the field lens to
the focal lens of the eye lens. It is shown with a negative sign just to give
information that the final image is a inverted image.
We can have a terrestrial telescope to see the objects of the
earth. This telescope forms erect image of the object. It consists of another
lens called erecting lens. Because of the existence of the new lens, the length
of the telescope increases in this case. The purpose of the third lens is to
invert the image so that the final image is erect.
Problem and solution
In the given paper we have solve two problems basing on the
terrestrial telescope and the astronomical telescope and for any kind of
clarifications you can just post a comment at the end of the post.
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