In this experiment, you will virtually observe the images formed by a convex lens and a concave mirror. You will measure d_i, the distance the image is from the lens or mirror. You will also determine the image characteristics that include size, orientation of object, and the type of image. The lab will investigate the converging lens and converging mirror. Remember, the focal length is determined by the curvature of the lens and the index of refraction of the material used in making the lens.