Problem 6.57

Find the de Broglie wavelength of relativistic electrons reaching the anticathode of an X-ray tube if the short wavelength limit of the continuous X-ray spectrum is equal to $\lambda_{s h}=10.0 \mathrm{pm} ?$

\lambda=\lambda_{s h} / \sqrt{1+m c \lambda_{s h} / \pi \hbar}=3.3 \mathrm{pm}

Wave Properties of particles. Schrodinger Equation.