Question

What is a terrestrial telescope and an astronomical telescope?

Answer 1

Answer:

TERRESTRIAL TELESCOPE:

•                             A terrestrial scope will present an upright image.

• Terrestrial scopes are constructed to give magnification of objects, whereas astro scopes usually have a larger aperture so as to gather more light and show dim astro objects.

• Terrestrial scopes are almost always refractors (using all lenses) whereas astro scopes often utilise mirrors as well as lenses.

ASTRONOMICAL TELESCOPE:

                                                     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. The final image formed by an astronomical telescope is always virtual, inverted and magnified.

Explanation:

Answer 2

Answer:

(i) Astronomical telescopes are used for viewing distant stars and planets whereas terrestrial telescopes are used for viewing distant objects on earth.

(ii) The final image in the astronomical telescope is inverted whereas that in the terrestrial telescope is erect.

(iii) The astronomical telescope consists of two convex lenses whereas the terrestrial telescope consists of three lenses. The additional lens is there to produce an erect image.