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As we know, atom is always massive compared to photon, so its de Broglie wavelength (h/(mv)) is very small. In the textbook "quantum mechanics" written by Griffiths, Problem 1.18, it says "......
29 November 2016 6,815 13 View
Given the wavelength of the laser, how small can we focus the beam spot? Or what is the minimum beam waist after it is focused? Is there any relative experiment?
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