Question

two point objects are 24 cm apart .where should a convex lens of focal length 9 cm be put in between them from one source so that the image of both the sources are formed at the same place

Answer 1

Answer:

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Explanation:

O1 and O2 both from images at sames

So, if V1 → (+ve) than V2 → (­ve)

For O1 1/-v - 1/(-x) = 1/9 ....(1)

and 1/-v - 1/(24 - x) = 1/9 .....(2)

(1) + (2)

1/x + 1/24 -x = 2/9 ⇒ x2 - 24x + 108 = 0

⇒ x = 6 cm and x =18cm