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A 5.49-mm-high firefly sits on the axis of, and 10.3 cm in front of, the thin lens A, whose focal...

A 5.49-mm-high firefly sits on the axis of, and 10.3 cm in front of, the thin lens A, whose focal length is 5.95 cm. Behind lens A there is another thin lens, lens B, with focal length 29.3 cm. The two lenses share a common axis and are 56.9 cm apart. Is the image of the firefly that lens B forms real or virtual? How far from lens B is this image located (expressed as a positive number)?

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5 95 lo.3 2A 5.95 55:9-41a 4-8 cm 42. 29.3 + 93,9 cm 92-9 14.ten →亡ㄧ一4 a-8 1icm 2 6 i A

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