Task id16334
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Task id16334
The segment AB is located along a straight line passing through the focus of the collecting lens at an angle a = 60° to its main optical axis. The distances from points A and B to the focus F are equal, respectively: a = 5 cm, b = 10 cm. What is the focal length of the lens F, if it is known that the length of the segment AB is equal to the length of its image (Fig.a).
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Detailed solution. Format gif
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