A laser with 589 nm wavelength and a beam diameter of 2 mm is fed through a beam-expander, then aimed from point A to point B at a distance of 2.75 km. What expansion factor is required for the beam-expander in order that the diffraction-limited spot at point B has a diameter of 30 cm (defined as the diameter of the first dark ring) ?

A laser with 589 nm wavelength and a beam diameter of 2 mm is fed through a beam-expander, then aimed from point A to point B at a distance of 2.75 km. What expansion factor is required for the beam-expander in order that the diffraction-limited spot at point B has a diameter of 30 cm (defined as the diameter of the first dark ring) ?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter38: Diffraction Patterns And Polarization

Section: Chapter Questions

Problem 38.39P: Potassium iodide (Kl) has the same crystalline structure as NaCI, with atomic planes separated by...

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