question_answer

A combination of two thin lenses of the same material with focal lengths \[{{f}_{1}}\] and \[{{f}_{2}}\], arranged on a common axis minimizes chromatic aberration, if the distance between them is                                  [EAMCET 2005]

A)            \[\frac{({{f}_{1}}+{{f}_{2}})}{4}\]                                    

B)            \[\frac{({{f}_{1}}+{{f}_{2}})}{2}\]                                                                 

C)            \[({{f}_{1}}+{{f}_{2}})\]   

D)            \[2({{f}_{1}}+{{f}_{2}})\]