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Question
Explain the construction of Galileo’s telescope.
Solution
In 1609, Galileo constructed a telescope that provided an erect image of an object only with the help of two lenses. Galileo's telescope consists of two lenses located at the ends of a long tube, as shown in the figure below. Both lenses are arranged in such a way that the distance between them can be adjusted. The objective was a convex lens, and the eyepiece was a concave lens.
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