Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 35 - Optical Instruments - Exercises and Problems - Page 1017: 12


(a) Ellen is nearsighted. (b) Her far point without the glasses is $~~1.0~m$

Work Step by Step

(a) The prescription has a negative value. This means that the lens is a diverging lens. Therefore, Ellen is nearsighted. (b) We can find the location of the image: $P = \frac{1}{s}+\frac{1}{s'}$ $\frac{1}{s'} = P - \frac{1}{s}$ $\frac{1}{s'} = -1.0~m^{-1} - \frac{1}{\infty}$ $\frac{1}{s'} = -1.0~m^{-1}$ $s' = -1.0~m$ Her far point without the glasses is $~~1.0~m$
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