The objective lens of the refracting telescope at the Lick
Chapter 19, Problem 27P(choose chapter or problem)
Problem 27PThe 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 1000× for this telescope?
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