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                                    CITu=32A thin equiconvex lens (u =3/2) of focal length 10 cm is cutand separated and a materialof refractive index 3 is filledbetween them. What is the focallength of the combination?a.-10 cmb.-10/4 cmc.-10/3 cmd. of theseaway IIdistanceb. movingreal disic. movingthan itsd. movingreal dis13. What is theof refractiveFig. 1.389 | 
                            
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