I am having difficulties with the followingquestion: (a) The neutron is an elect

Question

   I am having difficulties with the followingquestion: (a) The neutron is an electrically neutral particle with amass approximately equal to the proton mass. An early modelconsidered the neutron to be an object where the electron isconfined inside the proton. Assuming that the proton radius is r˜10-15 m, estimate the electon's kinetic energy dueto Heisenberg uncertainty, and compare it to the neutron restmass. (b) A monochromatic beam of electons of energy E= 1 keV isincident on a shutter that opens for t=1 ns. What is thefractional energy spread v/v of the electron velocity vafter the shutter? (Decide first whether to perform a relativisticor a non-relativistic calculation.)    I am having difficulties with the followingquestion: (a) The neutron is an electrically neutral particle with amass approximately equal to the proton mass. An early modelconsidered the neutron to be an object where the electron isconfined inside the proton. Assuming that the proton radius is r˜10-15 m, estimate the electon's kinetic energy dueto Heisenberg uncertainty, and compare it to the neutron restmass. (b) A monochromatic beam of electons of energy E= 1 keV isincident on a shutter that opens for t=1 ns. What is thefractional energy spread v/v of the electron velocity vafter the shutter? (Decide first whether to perform a relativisticor a non-relativistic calculation.)

Explanation / Answer

I have figured out part A so all I need help with is B

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