GALILEAN TELESCOPE OR TERRESTRIAL TELESCOPE
A Galilean Telescope or a terrestrial telescope is an optical instrument which is used to see the magnified image of distant objects on earth. Galilean telescope consists of a convex lens as objective lens but a concave lens as eye piece. It always forms erect images of the objects seen through it.
Differences between Astronomical Telescope and Galilean Telescope
|S No.||Astronomical Telescope||Galilean Telescope|
|1.||An astronomical telescope is an optical instrument which is used to see the magnified image of distant heavenly bodies like stars, planets, satellites and galaxies etc.||A Galilean Telescope or a terrestrial telescope is an optical instrument which is used to see the magnified image of distant objects on earth.|
|2.||It consists of two convex lenses.||It consists of a convex objective lens and concave eye piece.|
|3.||The final image formed by astronomical telescope is always inverted.||The final image formed by Galilean telescope is erect.|
|4.||Its magnifying power is high.||Its magnifying power is low.|
Test Your Understanding and Answer These Questions:
- Which instrument is used to see distant objects?
- Why Galilean telescope is not used to seen heavenly bodies?
- Give differences between astronomical and Galilean telescope.
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