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power 4dFor the perfect blend, pour one packet of 4D Mix Pack powder into 16-24 ounces of cold water, shake well until fully dissolved, and enjoy. This ensures youTwo lenses have power of (i) + 2 d (ii) -4D. What is the nature and focal length of each lens? b. An object is kept at a distance of 100 cm from lens of power -4D. Calculate the image distance.