Two converging lenses, each with a focal length of 0.12 m, areused in combinatio

Question

Two converging lenses, each with a focal length of 0.12 m, areused in combination to form an image of an object located 0.36 m tothe left of the left lens in the pair. The distance between thelenses is 0.24 m. Reference: Ref 26-9
Where is the final image located relative to the lens on theright?

a. 0.36 m to the right of thelens
b. 0.12 m to the right of thelens
c. 0.12 m to the left of thelens
d. 0.18 m to the left of thelens
e. 0.06 m to the left of the lens Two converging lenses, each with a focal length of 0.12 m, areused in combination to form an image of an object located 0.36 m tothe left of the left lens in the pair. The distance between thelenses is 0.24 m. Reference: Ref 26-9 Where is the final image located relative to the lens on theright? 0.36 m to the right of thelens 0.12 m to the right of thelens 0.12 m to the left of thelens 0.18 m to the left of thelens 0.06 m to the left of the lens

Explanation / Answer

   Apply lens formula for the first lens is      1/f = 1/p + 1/q       1/(0.12m) = 1/(0.36 m) +1/q q = 0.18m For second lens        1/f = 1/p' + 1/q'        1/(0.12 m) =1/(0.24m - 0.18 m) + 1/q'     q' =  -0.12 m c. 0.12 m to the left of thelens 0.12 m to the left of thelens

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