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Debi kalyan satpathy asks : The dispersive power of the materials of two lenses are in the ratio 4/3.If the achromatic combination of the two lenses has focallength of +60cm,the focal length of component lense is:- 
 
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Rachit says :
17/05/2011 01:51:03
i will got 345 to 350 marks how much rank i will get in aipmt main
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