Which of the following properties is identical for all electromagnetic waves, from radio waves to gamma waves, when travelling through a vacuum?
They all have the same wavelength
They all have the same speed
They all have the same frequency
They all have the same energy
26 exam-style questions on Edexcel GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves and refraction in glass (core practical), 5.2.2 Groups of the electromagnetic spectrum, 5.2.3 Wavelength-dependent behaviour of EM waves, and 5.2.4 Velocities of EM waves in different substances. Each one has a worked solution and a mark scheme showing where the marks go.