Problem based on achromatic lens
Question: An achromatic lens is made of two very thin lenses, with focal lengths f1 = -28.7 cm and f2 = +20.4 cm, that are placed in contact.
What is the focal length of the achromatic lens?
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An achromatic lens is made of two very thin lenses, with focal lengths f1 = -28.7 cm and f2 = +20.4 cm, that are placed in contact.
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