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what is the wavelength of thermal neutrons? what "type" of light would this correspond to (X-ray,...

what is the wavelength of thermal neutrons? what "type" of light would this correspond to (X-ray, UV, VIS, IR)?
hint: a thermal particle has an average kinetic energy of ekin=3/2 KT with KT= 25 meV. m(neutron) = 1.674x10^-27 kg.

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