Simple Telescope - English
504 بار بازدید -
7 سال پیش
-
Dear Friends, today we will
Dear Friends, today we will make a Simple Telescope for watching the Night Sky. You will need thick / thin PVC pipes, elbows, couplers, holders, diagonals, reducers, cradle and end-flange. You will also need a wooden base with some nut-bolts. You will also need a few lenses. The first lens is flat on one end and concave on the other. Its diameter is 4.5-cm and focal length is 45-cm. The second lens is convex on one side and flat on the other. Its diameter is 2.5-cm and focal length is 3.5-cm. The third lens
7 سال پیش
در تاریخ 1396/03/15 منتشر شده
است.
504
بـار بازدید شده