(a(i))[1]
State an effect that gives evidence for the wave nature of a particle.
(a(ii))[1]
State an effect that gives evidence for the particulate nature of electromagnetic radiation.
(b(i))[1]
Four electron energy levels in an isolated atom are shown in Fig. 12.1. For the emission spectrum associated with these energy levels, on Fig. 12.1, mark with an arrow the transition that produces the shortest wavelength.
(b(ii))[2]
Show that the wavelength of the transition in (b)(i) is $4.35 \times 10^{-7}\,\text{m}$.
(c(i))[2]
State what is meant by the de Broglie wavelength.
(c(ii))[2]
Calculate the speed of an electron having a de Broglie wavelength equal to the wavelength in (b)(ii).