compare Terrestrial telescope and astronomical telescope
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: As you may have guessed, astronomical telescopes are used to look at things not on the Earth and terrestrial telescopes look at things on the Earth. But there is a big difference in how they are made. ... An astronomical telescope uses another, smaller lens to focus the light from the small image into our eye
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The two advantages of a reflecting telescope over a refracting telescope are as follows
: (i) There is no chromatic aberration in case of reflecting telescopes as the objective is a mirror.
(ii) Spherical aberration is reduced in case of reflecting telescopes by using mirror objective in the form of a paraboloid.
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