(a(i))[1]
State the name of the process as the wave travels through the gap.
(a(ii))[3]
On Fig. 6.2, draw three wavefronts for this wave as it approaches the gap and three more as it continues beyond it.
(b)[2]
In the blank column of Table 6.1, insert the numbers 1 to 5 to show the wavelength order. Use 1 for the wave with the shortest wavelength and 5 for the wave with the longest wavelength.
(c(i))[1]
State the speed of radio waves in air.
(c(ii))[3]
Calculate the wavelength of these radio waves.