Question

CONVEX LENSES Optics 173 In this tutorial, use a straightedge to draw lines that are meant to be straight. I. Convex lenses A. Look at a very distant object through a convex lens. Hold the lens at arm's length so that you see a sharp image of the distant object. Is the image formed by the lens in front of behind, or on the surface of the lens? Use the method of parallax to determine the approximate distance between the image and the lens. B. Consider a point on the distant object that is also on the principal axis of the lens. On the diagram below, sketch several rays from this distant point that reach the lens. to very distant object Principal axis Convex Lens How are these rays oriented with respect to one another and to the principal axis? Explain. On the basis of your observations from part A, show the continuation of each of these rays through the lens and out the other side. On the diagram, indicate where the rays converge. Note: Refraction takes place at the two surfaces of the lens. However, in drawing a ray diagram for a thin lens, it is customary to draw rays as if all refraction takes place at the center of the lens. C. Suppose that you placed a very small bulb at the location of the image in part B. How would the rays from the bulb that have passed through the lens be oriented? Draw a diagram to illustrate your answer. Explain. - Principal axis Convex lens _ Discuss your answers with a tutorial instructor

Answer 1

Image Formation by a Converging Lens Object Eye 2F 2F -Eye Image Location -Eye $ Eye Eye Image I QF 2F F Bulb