4D History - 4D Statistic

power 4dTranscript. 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 cmClick here 👆 to get an answer to your question ️ An object is placed at a distance of 10cm from a lens of power 4D.find the position and nature of the image f…