question_answer

A hollow double concave lens is made of very thin transparent material. It can be filled with air or either of two liquids \[{{L}_{1}}\] or \[{{L}_{2}}\] having refractive indices \[{{\mu }_{1}}\] and \[{{\mu }_{2}}\] respectively \[\left( {{\mu }_{2}}>{{\mu }_{1}}>1 \right)\]. The lens will diverge a parallel beam of light if it is filled with

A) air and placed in air

B) air and immersed in \[{{L}_{1}}\]

C) \[{{L}_{1}}\] and immersed in \[{{L}_{2}}\]

D) \[{{L}_{2}}\] and immersed in \[{{L}_{1}}\]