A 31.0-cm-focal-length converging lens is 21.0cm behind a diverging lens. Parallel light strikes the diverging lens. After

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A 31.0-cm-focal-length converging lens is 21.0cm behind a diverging lens. Parallel light strikes the diverging lens. After passing through the converging lens, the light is again parallel. What is the focal length of the diverging lens?
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Physics

ISBN: 978-0077339685

2nd edition

Authors: Alan Giambattista, Betty Richardson, Robert Richardson

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