A certain crystal has a set of planes spaced 030 nm apart a, Ask an Expert

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A certain Crystal has a set of planes spaced 0.30 nm apart. A beam of neutrons strikes the crystal at normal incidence and the first maximum of the diffraction occurs at ?=42 degree.

(a) What is de-Broglie wavelength of neutron beam?

(b) What should be moment and kinetic energy of the neutron beam?

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