Unformatted text preview: Aim them at your lenses. What do you see? 4) Determine the focal length of each lens. 5) Obtain an optical bench and some mounted lenses. Use a piece of paper as a screen to observe the images. Record what you see. How does this vary as you move the screen and the projector? Try looking directly through the lens. How do your observations compare for the pinhole camera and the lens? Guide to notes in your lab book: 1. Before obtaining an optical bench, try drawing a ray diagram of what you will observe when you mount the lens. 2. When observing the image on the screen, make a note of size and orientation of the image. When looking through the screen, also make a note of the perceived depth of the projector-- does it seem closer, or further away? 3. Try to draw ray diagrams to describe what you see. If necessary, observe your ray box again....
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- Spring '09
- Physics, Photographic lens, Book of Optics