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When building a refracting telescope, does the diameter of the eyepiece matter? And why do we need to move the eyepiece (as in my textbook) if the image is always focused at
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DIY Telescope (Grades 9-12): With the "Building a Telescope" activity, students use mailing tubes, convex lens… | Diy telescope, Physical science lessons, Telescope
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TELESCOPE EYEPIECE
