Upside Down Telescope: Make & Attach 2nd Tube

Video Transcript

"Now we're ready to attach the magnifying glass to our second piece of corrugated paper. We're going to start out by doing the same thing; putting a layer of rubber cement glue around the outside of the magnifying glass. Once we have a thick layer of glue, we'll lay the magnifying glass onto the corrugated paper, and we're going to roll it around, and seal it tightly; like we did with the first piece. And again, we're going to have that little strip left over where the handle is, so we go ahead and cut it down, and now the rest of the corrugated paper will be able to close. Before we close it, we're going to have to make it a little bit wider than the first one we did; because remember; this tube is going to have to fit over the first tube we did. That's going to enable us to move the tubes in and out from each other, and it's going to help us focus on different objects. What we have to do is start by closing it around where the magnifying glass is, because we want the magnifying glass to sit securely inside the corrugated paper tube. Before we seal the other end, we're going to put the first tube inside, and we're going to make sure that there's enough room to move it in and out. Once we get the right size to enable it to move easily, we're going to apply our glue and seal it. The top tube is actually going to get wider as it gets closer to the opposite end, and that's going to let us move the tubes in and out from each other. We put the glue on, and while it's on top of the inner piece of corrugated paper we seal it; making sure that it's not sitting so tight that the inner tube cannot be moved in and out. Now we see that because we attached the two tubes in a way that gives us some space, we can now move them in and out, and we see the magnifying glasses are attached at both ends. As we move them in and out we're going to be able to focus differently on an object; from different distances. Now I've shown you how to make the outer tube of corrugated paper big enough so that we can move it in and out, and focus on objects; using the upside down telescope."