A transmitter produces 6.0 × 106 complete electrical oscillations in 0.050 s. The radio waves travel at 3.0×108 m s−13.0\times10^8\ \mathrm{m\,s^{-1}}3.0×108 ms−1. What is their wavelength? Use v=fλv=f\lambdav=fλ.
1000 m1000\ \mathrm{m}1000 m
0.40 m0.40\ \mathrm{m}0.40 m
50 m50\ \mathrm{m}50 m
2.5 m2.5\ \mathrm{m}2.5 m
104 exam-style questions on Edexcel GCSE Physics 5.4 Uses and dangers of EM radiation, covering 5.4.1 Dangers of electromagnetic radiation, 5.4.2 Uses of electromagnetic radiation, 5.4.3 Radio waves and oscillations in circuits, and 5.4.4 Changes in atoms and nuclei generating radiation. Each one has a worked solution and a mark scheme showing where the marks go.