The beam emerging from a ruby laser passes through a circular aperture 5.0 mm in diameter. (a)
Question:
(a) If the spread of the beam is limited only by diffraction, what is the angular spread of the beam?
(b) If the beam is aimed at the Moon, how large a spot would be illuminated on the Moon's surface?
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a The location of the first diffraction minimum for a beam passing through a circular aperture i...View the full answer
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Related Book For 
Physics
ISBN: 978-0077339685
2nd edition
Authors: Alan Giambattista, Betty Richardson, Robert Richardson
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