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in Physics by (63.7k points)

An object is placed at a distance of 12 cm to the left of a diverging lens of focal length −6.0 cm. A converging lens with a focal length of 12.0 cm is placed at a distance d to the right of the diverging lens. Find the distance d that corresponds to a final image at infinity.

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The concave lens forms the image of the object at point say I1 . This image acts as the object for convex lens and the final image is formed at say I1’.

Applying lens formula 1/v - 1/u = 1/f twice, we have

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