Collect at least six convex lenses of different thicknesses and apertures. Find their approximate
focal lengths by making the clear image of a distant object on the wall and then measuring the
distance between the lens and the wall. Select the best pair of lenses for making a refraction type
astronomical telescope. Write the criteria you have kept in mind while making the choice of pair of
lens. Set the telescope for normal adjustment. Select a third lens to make the final image erect.
Find magnifying power and telescopic length in the setting
Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…
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