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Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
25
Optical Instruments
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25-1: Camera
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25-2: Eye and Corrective Lenses
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25-3: Magnifying Glass
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25-4: Telescopes
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25-5: Microscopes
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25-6: Lens Aberrations
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25-7 to 25-9: Resolution Limits
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25-11: X-Ray Diffraction
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25-12: Imaging by Tomography
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Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 59
Q

Suppose that you wish to construct a telescope that can resolve features 6.5 km across on the Moon, 384,000 km away. You have a 2.0-m-focal-length objective lens whose diameter is 11.0 cm. What focal-length eyepiece is needed if your eye can resolve objects 0.10 mm apart at a distance of 25 cm? What is the resolution limit set by the size of the objective lens (that is, by diffraction)? Use λ\lambda = 560 nm.

A
fe=8.5 cm, θ=6.2×10−6 rad,  min distance =2.4 kmf_e = 8.5 \textrm{ cm, } \theta = 6.2 \times 10^{-6} \textrm{ rad, } \textrm{ min distance } = 2.4 \textrm{ km}
Giancoli 7th Edition, Chapter 25, Problem 59 solution video poster
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