<p>(a) How do electromagnetic waves get their energy from a charge q oscillating at a given frequency?</p>

<p>(b)&nbsp;What kind of electromagnetic waves has wavelengths between <span class="equation">\(10^{-7}\)</span>&nbsp;and <span class="equation">\(10^{-9}\)</span>&nbsp;metres? What causes these waves to occur? Note the two purposes. (2+3 marks)</p>