if a person seeing the moon from the window with using pvc pipe it has two concave lenes to pvc pipe front and back, now the person where he can see the object (moon)?
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The rays coming from moon are parallel. The first lens converges the rays at focus. (2) The converging point is the focus of second lens. So, the second lens convert the diverging rays into parallel. (3) Hence, in the rays of moon there will be no change when we see moon with this arrangement or without this arrangement.
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