Ryan's+Telescope

=Telescope= =5/25/10=


 * Participants**: The one and only
 * Purpose**: The purpose is to learn how lenses refract light to create images. More specifically how lenses work in a telescope.
 * Lab Documents**:


 * Brief Description of Experiment**:In this lab we made a telescope. WE then took pictures of what we were doing so it is seen what we were doing. After we created a working telescope we then drew out a side view of the inside of the telescope to futher understand what was going on to make the telescope work. We made our tkelescope out of a meterstick / yardstic that held up lenses. A poster was wrapred around the telescope to block image obsfuscating unwated light. Without using the poster. light would come in to mess up images and make them not as clear or not seen.


 * Data**:

This here photo is of my telescope I drew out on paper. As you can see it is labeld according so it is easily interpreted.

These are photos of the actual telescope. The first picture is me looking through the telescope down the hallway. The Middle picture is viewing the grateful dead poster in the science room. The furthest picture to the right goes along with the picture on the left. The picture on the right is what I would be viewing looking down the hallway at Mike.







When we were finding the focal length for the actual telescope, we saved time by facing the lenses (one at a time) towards the window and a paper on the other side of the lense. The image of the window would focus at the paper when the paper is at the lense's focal point.
 * Sample Calculations:** During this lab there weren't any real specific calculations like finding velocity or anything. The only calculations that actually took place was how we found the focal points of the lenses and how they relate to the telescope.
 * The focal length calculation focal length = (Object distance x Image distance) / (Image distance +Object distance)**


 * Results**: Through calculations and hands on experimentation with telescopes we were able to make an actual working telescopedesribed in the calculations.


 * Lab Questions**:



The **magnification** of different lensesis shown in the graph above. The different focal lengths showed changes in magnification. Lenses with smaller focal legnths showed to have greater magnification. We used these lenses as our eyepiece (our third lense).

I think that our favorite combination of lenses for the first telescope is the one we started off with. The focal length was 7cm and the diameter of the lense was 6cm. Together the magnification (focal length / eye peice diameter) equaled one and one sixth times the size of the actual object.


 * Conclusion**: I would conclude that the experiment produced a valid job of creating a telescope. The lab enabled us to understand how telescopes work and how changing different things like lenses and distance effect everything in the telescope. We saw that different lenses produduced different images and different outcomes. One lense we used was kind of blury. I think that it is possible that if we had used a different lense we would have had a clearer image. Also when looking down the telescop the image seemed to be set to the side. The alignment was a little off center and this changed what we were able to see. At first when we were all making the telescopes we were not using a poster to block out unwanted light. This made it so that we could not actually see the image we were suposed to--magnified and upside right. WE disoverd the solution and fixed it, I think that was the only main problem that we had.