Task id9713
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Task id9713
An air lens formed by two thin glasses with different radii of curvature is placed in water (Fig.). Find the focal length of this lens, knowing that a glass lens of the same shape has a focal length F1 = 40 cm in air. The absolute refractive indices of glass and water are n1 = 1.5 and n2 = 1.3, respectively.
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Detailed solution. Format png
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