1. The problem statement, all variables and given/known data To produce x-ray radiation, electrons are accelerated in vacuum and aimed so as to collide with a target. Assume that all of the electron kinetic energy is converted into the energy of the x-ray photon on collision and that the wavelength of the resulting radiation is 1.24 angstroms. 2. Relevant equations h^2/(2*(e)(m)(λ)^2) 3. The attempt at a solution (6.63*10^-34)^2/(2(1.6*10^-19)(9.11*10^-31)(1.24*10^-9)^2) =.979 V /1000 for kV = .000979 kV. I entered this answer and it told me it was incorrect.