(a)[2]
State the name of the part of the electromagnetic spectrum found in region P, Q and R.
(b)[1]
On Fig. 10.1, place a tick (✓) in every box that shows the components with frequencies higher than the frequencies of visible light.
(c(i))[3]
Calculate the frequency of infra-red radiation with wavelength $9.4 \times 10^{-7}\,\text{m}$.
(c(ii))[2]
Explain how infra-red radiation is used in television remote controllers.
(d)[2]
On Fig. 10.2, draw the route taken by the light as it moves through the glass and into the air.