The objective lens of the refracting telescope at the Lick Observatory in California has a focal length

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The objective lens of the refracting telescope at the Lick Observatory in California has a focal length of 57 ft. 

a. What is the refractive power of this lens? 

b. What focal length (mm) eyepiece would give a magnification of 1000x for this telescope?

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College Physics A Strategic Approach

ISBN: 9780321595492

2nd Edition

Authors: Randall D. Knight, Brian Jones, Stuart Field

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