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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 57
Q

If you could shine a very powerful flashlight beam toward the Moon, estimate the diameter of the beam when it reaches the Moon. Assume that the beam leaves the flashlight through a 5.0-cm aperture, that its white light has an average wavelength of 550 nm, and that the beam spreads due to diffraction only.

A
1.0×104 m1.0 \times 10^4 \textrm{ m}
Giancoli 7th Edition, Chapter 25, Problem 57 solution video poster
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