A) \[{{\operatorname{F}}_{1}}\,\,+\,\,{{F}_{2}}\]
B) \[{{\operatorname{F}}_{1}}\,\,-\,\,{{F}_{2}}\]
C) \[{{\operatorname{F}}_{1}}\]
D) \[{{F}_{2}}\]
Correct Answer: A
Solution :
\[{{L}_{1}}\] will converge the parallel ray at its focus and \[{{L}_{2}}\] will render it parallel only when the refracted ray starts form focus of Lg. \[\therefore \,\,\,\, Distance between {{L}_{1}} and {{L}_{2}} ={{F}_{1}} + {{F}_{2}}\]You need to login to perform this action.
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