Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 25 - Optical Instruments - Problems - Page 741: 49

Answer

a) $l=14cm$ b) $M=130X$

Work Step by Step

a) $d_i=\frac{f_od_o}{d_o-f_o}=\frac{0.740cm\times0.790cm}{0.790cm-0.740cm}=11.69cm$ $l=d_i+f_e=11.69cm+2.80cm=14.49cm$ b) $M=\frac{N}{f_e}\bigg(\frac{l-f_e}{d_o}\bigg)=\frac{25.0cm}{2.80cm}\bigg(\frac{14.49cm-2.80cm}{0.790cm}\bigg)=130X$
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