(II) An achromatic lens is made of two very thin lenses,
Chapter 25, Problem 51P(choose chapter or problem)
Problem 51P
(II) An achromatic lens is made of two very thin lenses, placed in contact, that have focal lengths f1 = -27.8 cm and f2 = +25.3 cm. (a) Is the combination converging or diverging? (b) What is the net focal length?
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