(a)[3]
State three additional observations from photoelectric emission that show electromagnetic radiation has a particulate nature.
(b(i))[2]
Explain why emitted electrons can have kinetic energy below the maximum value at a particular frequency.
(b(ii)1)[1]
Use Fig. 9.1 to find the threshold frequency.
(b(ii)2)[3]
Use Fig. 9.1 to find the work function energy, in $\text{eV}$, of the metal surface.
(ii.1)[1]
Use Fig. 9.1 to find the threshold frequency.
(ii.2)[3]
Use Fig. 9.1 to find the work function energy, in eV, of the metal surface.