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: 57

Answer

lens 1

Work Step by Step

We are given that the two lenses have focal lengths $f_1=0.45cm$ and $f_2=1.9cm$. The lens with less focal length is used as an objective in the microscope. We also know that the objective is a converging lens with a relatively short focal length; hence, lens 1 with focal length $f_1=0.45cm$ is used as an objective.
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