question_answer

In the figure given below there are two convex lens\[{{L}_{1}}\] and \[{{L}_{2}}\] having focal length \[{{F}_{1}}\] and \[{{F}_{2}}\] respectively. The distance between \[{{L}_{1}}\] and \[{{L}_{2}}\] will be

A) \[{{F}_{1}}\]                                      

B) \[{{F}_{2}}\]

C) \[{{F}_{1}}+{{F}_{2}}\]                  

D) \[{{F}_{1}}-{{F}_{2}}\]

Correct Answer: C

Solution :

The point at which the light ray intersects the principal axis is the focus of both the lenses. Distance between two lenses is \[d={{F}_{1}}+{{F}_{2}}\]