(a(i))[2]
State the names of these two parts.
(a(ii))[1]
From Fig. 7.1, identify the type of electromagnetic wave shown.
(b)[1]
All electromagnetic waves travel at the same speed in a vacuum. State one further property shared by every electromagnetic wave.
(c(i))[1]
For remote controllers for televisions, state one type of electromagnetic radiation that can be used.
(c(ii))[1]
For killing bacterial cells, state one type of electromagnetic radiation that can be used.