A thin double-convex lens with focal length f is used to magnify the date stamp on an old coin. The numerals in the date stamp have an average height h. The coin is placed at a distance of 3f/4 from the lens, and the image is viewed with the eye placed very close to the lens. Assume that the near point of the observer is dnp. In terms of f,dnp, and h, determine the (a) image distance, (b) lateral magnification, (c) angular magnification, and (d) height of the numerals as viewed through the magnifier.
Part G
Determine the angular magnification.
Express your answer in terms of dnp and f.