Question: A praying mantis preys along the central axis of a thin symmetrical lens, 20 cm from the lens. The lateral magnification of the mantis provided by the lens is m = -0.25, and the index of refraction of the lens material is 1.65.
(a) Determine the type of image produced by the lens; whether the object (mantis) is inside or outside the focal point; on which side of the lens the image appears; and whether the image is inverted.
(b) What is the magnitude r of the two radii of curvature of the lens?