Question

what are the functions of lenses in telescopes

Answer 1

The most important function of the astronomical telescope is:

Resolving power

Light gathering power

magnifying power

focal length

The focal length obviously means nothing here, as well as the magnification (that can always be done later). As far as resolving power and light gathering power go though, they both seem to be "equally" important, in that without the first, there is no detail, and without the second, there is no image.

It does seem that exposure time can compensate for a lack of light gathering power (what matters is the product between the two), but nothing can compensate for resolving power

Answer 2

hey mate here is ur answer.....
the function of lenses in telescope is toake the focus the light and make the distant brighter,clear and magnified
hope it helps u
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