You should place the convex side so that it points out, but the difference is slight enough that If you lookĬlosely at the lens you may see that it is curved out (convex) on one side and flat on the other. Piece and putting the whole on the end of the large tube as the objective lens. ![]() To make such a telescope for yourself start by placing the largest lens into the red plastic The lens closest to the object is called the objective and the lens closest to the eye is One diverging (which causes parallel light to diverge from a focal point), located at the ends of a long tube as shown in the figure below. One converging (which causes parallel light from the sun to converge to a focal point) and The telescope Galileo used was a refracting telescope.
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