Physical Sciences 3 Study Guide - Final Guide: Lens (Optics), Focal Length, Thin Lens
10 Jun 2019
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Document Summary
When light passes through a curved surface (e. g. a lens), the light rays will be bent in a predictable fashion. For a convex spherical surface, as found on a converging lens, incoming parallel rays will be focused on the far side of the lens at a point called the focal point. For a concave spherical surface, as found on a diverging lens, incoming parallel rays will diverge as if they had emerged from the focal point on the near side of the lens. For any object-that is, a source of light-we can predict the image by tracing three principal rays through the lens. We can calculate the location and properties of an image using the thin lens equation: 1 do di where/is the focal length, do is the distance to the object, and di is the distance to the image.
