The power of a lens is +4D. What is the nature of lens

power 4d A convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective power of combination will be . View Solution; Knowledge Check. A convex lens of focal length 40 cm. Durapower Group offers closed-loop, end-to-end Energy Storage Solutions for a variety of e-mobility, specialty, and stationary applications. Focusing on the manufacturing, research,

powernet77, Transcript. Question 39 If the power of a lens is − 4.0 D, then it means that the lens is a (A) concave lens of focal length −50 m (B) convex lens of focal length +50 cm.