(a)[1]
State one property of electromagnetic waves that other transverse waves do not share.
(b)
In Fig. 5.1, the seven parts of the electromagnetic spectrum are shown as blocks A to G. A suitable wavelength for the visible region D is $500\,\text{nm}$.
(b(i))[3]
Give the main radiations and a typical wavelength for each of regions B, E and F.
(b(ii))[2]
Calculate the frequency for a wavelength of $500\,\text{nm}$.
(c)[2]
Every wave in the spectrum shown in Fig. 5.1 can be polarised. Explain what is meant by polarised.