A high-powered laser beam (l ! 600 nm) with a beam
Chapter , Problem 48(choose chapter or problem)
A high-powered laser beam (l ! 600 nm) with a beam diameter of 12 cm is aimed at the Moon, 3.8 " 105 km distant.The beam spreads only because of diffraction. The angular location of the edge of the central diffraction disk (see Eq. 36-12) is given by where d is the diameter of the beam aperture. What is the diameter of the central diffraction disk on the Moons surface?
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