question_answer

An equiconvex lens is cut into two halves along (i) POP9 and (ii) LOU as shown in figure. Let\[\text{KMn}{{O}_{\text{4}}}\]be the focal lengths of the complete lens of each half in case (i) of each half in case (ii) respectively. The correct statement from the following

A) \[\left( {{\text{H}}_{\text{2}}}{{\text{C}}_{\text{2}}}{{\text{O}}_{\text{4}}}-\text{2}{{\text{H}}_{\text{2}}}\text{O} \right)\]

B) \[-\text{ 3268 kJ mo}{{\text{l}}^{\text{-1}}}\]

C) \[-\text{3264}\,\text{kJmo}{{\text{r}}^{\text{-1}}}\]      

D) \[-\text{ 326}.\text{4 kJ mo}{{\text{l}}^{\text{-1}}}\]

Correct Answer: A

Solution :