a convex lens of power 4d is placed at a distance of 40cm
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power 4d Two 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.. have found 30749 great 4d Desn Powerpoint templates for free. More animated ppt about 4d Desn free Download for commercial usable,Please visit . Follow
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