Advantages and Disadvantages of an Astronomical Telescope
The telescope which is used for viewing celestial bodies like sun, moon, Planets, stars etc. is called astronomical telescope. It is an optical instrument which is used to see the magnified image of distant heavenly bodies like stars, planets, satellites, and galaxies etc.
Advantages of an astronomical telescope: Mainly four advantages are found in art astronomical telescope: viz—
(a) It creates large magnification,
(b) Its field of view is wide,
(c) The image is free from aberration and
(d) Cross-wire and micrometer screw are used when needed.
Disadvantages of an astronomical telescope: In this instrument, two disadvantages are found; viz –
(a) As the main tube is very long, so the instrument becomes quite large and
(b) As an inverted image is formed in this instrument, so it is not usable for observing objects at a long distance front the earth’s surface.