The "Show many rays" setting allows you to see a depiction of light being diffusively scattered from the point of the arrow. Only those scattered rays which intersect the lens are shown. That said it should be clear that the many rays all intersect or rather converge to a single point. This place where the rays converge is the location of the image. It is more common to concern ourselves with only three of these rays, called the principle rays. Use the check boxes to switch from "Show many rays" to "Show three rays." Because the lens is curved, each ray encounters the surface of the lens at a slightly different angle. Snell's Law tells us that each light ray is going to be bent at a slightly different angle. Here is where it gets interesting. The bent rays intersect each other at a single point and form an image. The relationship between the object distance (so), the image distance (si), and the focal length (f) is captured by the thin lens equation Capture3.PNG Choose any focal length other than the default 10. Move the object to any position on the optical axis outside the focal length e.g., beyond the point F' (pronounced f prime.), Measure the image (si) and object distances (so). Repeat 5 times. In your laboratory notebook, create a table that contains the focal length, object distance, and measured image distance. In two additional columns, include the image distance calculated from the thin lens equations above and the difference between the two image distance