A contact lens is made of plastic with an index of refraction of 1.5. The lens has an outer radius of curvature of +2 cm and an inner radius of curvature of +2.5 cm. a) What is its focal length? b) If we place an object at a distance of 5 cm from this lens, what will be the distance between the object and its image? draw the diagram

A contact lens is made of plastic with an index of refraction of 1.5. The lens has an outer radius of curvature of +2 cm and an inner radius of curvature of +2.5 cm. a) What is its focal length? b) If we place an object at a distance of 5 cm from this lens, what will be the distance between the object and its image? draw the diagram