Ray diagram for two lenses kept at some distance given in the diagram,which of the following option is correct ( f1,f2= focal length; d= distance between lenses )
A
f1+f2>d
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B
f1+f2<d
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C
f1+f2=d
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D
Combination behaves like converging lens
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Solution
The correct option is Bf1+f2=d Parallel ray meets at focus after Refraction and ray passes through focus become parallel after refraction. ∴ clearly from figure d=f1+f2