question_answer

If \[{{\omega }_{1}}\]and \[{{\omega }_{2}}\] are dispersive powers of lenses of focal length\[{{f}_{1}}\] and\[{{f}_{2}}\] respectively. Then the conditions of chromatic aberration for two. lenses in contact is :

A) \[\frac{{{\omega }_{1}}}{{{\omega }_{1}}}=\,\,\frac{{{f}_{2}}}{{{f}_{1}}}\]                            

B) \[\frac{{{\omega }_{2}}}{{{\omega }_{1}}}=\frac{{{f}_{1}}}{{{f}_{2}}}\]

C) \[\frac{{{\omega }_{1}}}{{{\omega }_{2}}}=\frac{{{f}_{1}}}{{{f}_{2}}}\]                   

D) \[\frac{{{\omega }_{1}}}{{{\omega }_{2}}}=\frac{{{f}_{1}}}{{{f}_{2}}}\]