SOLVED:Show that the diffractive spread of a laser beam, ≈λ/ D as described in Section 9 of "Quantum Mechanics of Atoms", is precisely what you might expect from the uncertainty principle. [Hint: since the beam's width is constrained by the dimension of the aperture D, the component of the light's momentum perpendicular to the laser axis is uncertain.
SOLVED:Show that the diffractive spread of a laser beam, ≈λ/ D as d…
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