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An eyepiece of a telescope consists of t...

An eyepiece of a telescope consists of two plano-convex lenses `L_(1)` and `L_(2)` each of focal length f separated by a distance of 2f/3. where should `L_(1)` be plaecd relative to the focus of the objective lens of the telescope so that the final image through `L_(2)` is seen at infinity ?

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