(a)[2]
State what the term photon means.
(b)
Fig. 8.1 shows an X-ray tube where a metal target produces X-rays. Particles travel from the filament to the target after being accelerated by a steady high voltage across terminals X and Y.
(b(i))[1]
State the particle name.
(b(ii))[1]
On Fig. 8.1, label terminals X and Y with $+$ and $-$ to show the polarity of the high voltage.
(c)
For an accelerating voltage of $32\,\text{kV}$ in Fig. 8.1, find:
(c(i))[1]
the greatest energy, in $\text{MeV}$, of an X-ray photon created at the target.
(c(ii))[2]
the greatest momentum of an X-ray photon created at the target.
(c(iii))[3]
the shortest wavelength of X-rays produced at the target.
(d)[3]
Explain why X-rays may be used to form images of internal body structures with good contrast.