In an X-ray tube (see Fig. 25-35 and discussion in Section 25-11), the high voltage between filament

Question:

In an X-ray tube (see Fig. 25-35 and discussion in Section 25-11), the high voltage between filament and target is V. After being accelerated through this voltage and electron strikes the target where it is decelerated (by positively charged nuclei) and in the process one or more X-ray photons are emitted.
(a) Show that the photon of shortest wavelength will have

(b) What is the shortest wavelength of X-ray emitted when accelerated electrons strike the face of a 30-kV television picture tube?

hc eV