Physics

Problem

A beam of neutrons has a measured de Broglie wavelength of

0.50\,\text{Å}

. Given the neutron mass

m_{n}=1.67\times10^{-27}\,\text{kg}

and Planck’s constant

h=6.63\times10^{-34}\,\text{J s}

, answer the following. a. (i) Calculate the linear momentum of each neutron. b. (ii) Determine the kinetic energy of a neutron in electron-volt and joule. c. (iii) Compute the speed of the neutron and comment briefly on whether the non-relativistic approximation used in your calculation is justified.

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