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power 4dA convex lens of power + 6D is placed in contact with a concave lens of power – 4D. What is the nature and focal length of the combination. see full answer. Start JEE NEET FoundationClick 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…