A marine radar transmitter on a cargo vessel emits pulsed microwave radiation to detect nearby obstacles. The microwaves have a wavelength of 1.2 cm1.2\text{ cm}1.2 cm. The speed of electromagnetic waves in air is 3.0×108 m s−13.0 \times 10^8\text{ m s}^{-1}3.0×108 m s−1.
Calculate the frequency of the microwave radiation. Give your answer in hertz (Hz) in standard form.
29 exam-style questions on AQA GCSE Physics 6.2 Electromagnetic waves, covering 6.2.1 Types of electromagnetic waves, 6.2.2 Properties of electromagnetic waves 1, 6.2.3 Properties of electromagnetic waves 2, 6.2.4 Uses and applications of electromagnetic waves, 6.2.5 Lenses, and 6.2.6 Visible light. Each one has a worked solution and a mark scheme showing where the marks go.