Abstract
The principal terms used to describe the action of a lens are shown in Fig. 10.1. Rays parallel to the principal axis converge to a point called the principal focus. The distance from the principal focus to the optical centre (or pole) is the focal length of the lens.
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© 1986 H. J. P. Keighley
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Keighley, H.J.P. (1986). Lenses, the Eye, the Camera and the Slide Projector. In: Work Out Physics ‘O’ Level and GCSE. Macmillan Master Series. Palgrave, London. https://doi.org/10.1007/978-1-349-07213-2_11
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DOI: https://doi.org/10.1007/978-1-349-07213-2_11
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-36788-9
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