Two lenses of power -5D and + 3D are placed in contact. Find the focal length of combination. The combination is converging or diverging? Give reason.
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पदतरतवतपतपरचरपतहजहजगडकचनसुररदचकनरपमजरपततपजरटपचवचववकुहकुदरेपैकितकहिग्
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Explanation:
power of combination = - 5D+ 3D= - 2D
negative sign indicates that it is diverging
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