Two convex lenses of focal lengths `f_(1) and f_(2)` are placed coaxially, a distance `d` apart. If the axis of one of the lenses is lifted parallel t

Monjur Alahi

Two convex lenses of focal lengths `f_(1) and f_(2)` are placed coaxially, a distance `d` apart. If the axis of one of the lenses is lifted parallel to itself by `Delta`, find the distance by which the focal point is shifted and the distance of the focal point from the first lens.


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Salim Ahmed Kawsar

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Correct Answer - `(Delta(f_(1)-d))/(f_(1)+f_(2)-d); (f_(1)f_(2)+d(f_(1)-d))/(f_(1)+f_(2)-d)`

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