A statue is 6.6 m from the opening of a pinhole camera, and the screen is 2.8 m from the pinhole.
(a) Is the image erect or inverted?
(b) What is the magnification of the image?
(c) To get a brighter image, we enlarge the pinhole to let more light through, but then the image looks blurry. Why?
(d) To admit more light and still have a sharp image, we replace the pinhole with a lens. Should it be a converging or diverging lens? Why?
(e) What should the focal length of the lens be?