A communications satellite sends a microwave pulse and a visible-light pulse towards a detector on a space station at exactly the same time. The pulses travel the same distance entirely through a vacuum.
Which statement about the arrival of the pulses is correct?
The visible-light pulse arrives first because it has a higher frequency.
The microwave pulse arrives first because it has a longer wavelength.
Both pulses arrive at the detector at the same time.
Neither pulse arrives because waves cannot travel without particles.
93 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.