A meniscus lens is one that has one concave surface, and one convex surface. A positive meniscus lens is a converging lens. A negative meniscus lens is a diverging lens. (a) Sketch a positive meniscus lens assuming light hits concave side first. Indicate which sides are concave and convex and which are R and R2 and whether R and R2 are positive or negative. R R2 (b) Determine the condition on |R| in order to produce a positive meniscus lens, assuming a glass lens in air and light hits concave side first.