In a laboratory, two infrared beams, A and B, are sent at the same moment along a vacuum tube to a detector at the far end. Beam A has more complete waves passing a point each second than beam B. Which statement is correct?
Beam A has a longer wavelength, and both beams take the same time to reach the detector.
Beam A has a shorter wavelength, and both beams take the same time to reach the detector.
Beam A has a longer wavelength, and it reaches the detector before beam B does.
Beam A has a shorter wavelength, and it reaches the detector before beam B does.
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.