Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 27 - Optical Instruments - Problems and Conceptual Exercises - Page 971: 46

Answer

far point: $16.0m$ near point: $32.3cm $

Work Step by Step

We can find the far and near points as follows: $d_i=(\frac{1}{f}-\frac{1}{d_{\circ}})^{-1}=(\frac{1}{f}-\frac{1}{\infty})^{-1}=(-0.0625m^{-1})^{-1}=-16.0m$ Now $far\space point=-d_i+0.0200m=-(-16.0m)+0.0200m=16.0m$ Now we find the near point as $d_i=(\frac{1}{f}-\frac{1}{d_{\circ}})^{-1}$ $d_i=(1.05dipoters-\frac{1}{0.250-0.0200})^{-1}=-30.3cm$ $near\space point=-d_i+0.0200=-(-30.3cm)+2.00cm=32.3cm$
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