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X rays with a wavelength of 88.0 pm are directed onto a gold foil and eject tightly bound electrons from atoms of the foil. The

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X rays with a wavelength of 88.0 pm are directed onto a gold foil and eject tightly bound electrons from atoms of the foil. The ejected electrons then move in circular paths of radius r in a region of uniform magnetic field with magnitude B. For the fastest of the ejected electrons, the product Br is equal to 2.40 x 10-4 T.m. Find (a) the maximum kinetic energy of those electrons and (b) the work done in removing them from the gold atoms. (a) Number Units (b) Number i UnitsThrough what angle must a 250 keV photon be scattered by a free electron so that the photon loses 8.0% of its energy? The electron Compton wavelength is 2.43 X 10'12 m. Number n Units v What is the maximum kinetic energy of electrons knocked out of a thin copper foil by Compton scattering of an incident beam of 19.0 keV X rays? Assume the work function is negligible. The electron Compton wavelength is 2.43 X 10'12 m. Number n Units v

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