A geophysicist is analyzing seismic shear waves (S-waves) generated by a controlled subterranean blast as they propagate from a deep basalt layer into an overlying sedimentary layer.
Write down the formula that relates wave speed, frequency, and wavelength.
As the seismic waves transition from the basalt layer to the sedimentary layer, their speed decreases. State which property of the wave (frequency or wavelength) remains constant, and explain why the other property must change.
In the basalt layer, the waves travel at a speed of 4500 m/s4500\text{ m/s}4500 m/s with a wavelength of 150 m150\text{ m}150 m. In the sedimentary layer, the wave speed decreases to 2700 m/s2700\text{ m/s}2700 m/s. Calculate the wavelength of the waves in this sedimentary layer.
6 exam-style questions on Edexcel IGCSE Physics Properties of waves. Each one has a worked solution and a mark scheme showing where the marks go.