Figure 33–49 is a photograph of an eyeball with the image of a boy in a doorway. (a) Is the eye here acting as a lens or as a mirror? (b) Is the eye being viewed right side up or is the camera taking this photo upside down? (c) Explain, based on all possible images made by a convex mirror or lens.

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1. Identify the nature of the eye in the photograph: Determine whether the eye is functioning as a lens or a mirror by considering how images are formed in each case. A lens refracts light and forms images on the opposite side of the lens from the object, while a mirror reflects light and forms images on the same side as the object.
2. Analyze the orientation of the image: Consider whether the image of the boy in the doorway appears upright or inverted. This will help in determining whether the eye is acting as a convex lens or a convex mirror, as convex lenses can produce both inverted and upright images depending on the object's distance from the lens, while convex mirrors always produce upright images.
3. Consider the position of the camera relative to the eye: Determine if the camera is positioned such that it views the eye right side up or upside down. This can be inferred from the orientation of the image formed in the eye.
4. Apply the properties of convex mirrors and lenses: Use the characteristics of image formation by convex mirrors (always virtual, upright, and reduced) and convex lenses (which can vary) to explain the observed image in the eye. Consider factors such as focal length, object distance, and image distance.
5. Draw conclusions based on the analysis: Based on the observations and properties of lenses and mirrors, conclude whether the eye is acting more like a lens or a mirror in the photograph, and whether the camera is taking the photo right side up or upside down.