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in Physics by (121k points)
A combination of two thin lenses with focal lengths `f_(1)` and `f_(2)` respectively forms and image of distant object at distance `60cm` when lenses are in contact. The position of this image shifts by `30 cm` towards the combination when two lenses are separated by `10 cm`. The corresponding values of `f_(1)` and `f_(2)` are
A. 30 cm, -60 cm
B. 20 cm, -30 cm
C. 15 cm, -20 cm
D. 12 cm, -15 cm

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1 Answer

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by (121k points)
Correct Answer - b

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