(a)[2]
State what the term photon means.
(b)
Fig. 8.1 shows a tube where X-rays are generated at a metal target. Particles are moved from the filament to the target by a constant high voltage across the terminals X and Y.
(b(i))[1]
State the particle name.
(b(ii))[1]
On Fig. 8.1, mark terminals X and Y with $+$ and $-$ signs to show the polarity of the high voltage.
(c)
Using an accelerating voltage of $32\,\text{kV}$ in Fig. 8.1, determine:
(c(i))[1]
the greatest energy, in $\text{MeV}$, of an X-ray photon produced at the target.
(c(ii))[2]
the greatest momentum of an X-ray photon produced at the target.
(c(iii))[3]
the smallest wavelength of X-rays produced at the target.
(d)[3]
Explain why X-rays can be used to form images of internal body structures with good contrast.