A guitar string of length L L\,L is securely clamped at both ends. A musician excites the third harmonic (second overtone) of the string, establishing a stationary wave.
Which of the following correctly describes the number of displacement antinodes along the string and the wavelength of this stationary wave?
2 displacement antinodes, wavelength 23L\frac{2}{3}L32L
3 displacement antinodes, wavelength 23L\frac{2}{3}L32L
3 displacement antinodes, wavelength 32L\frac{3}{2}L23L
2 displacement antinodes, wavelength LLL
26 exam-style questions on OCR A A Level Physics Waves, covering Wave motion, Electromagnetic waves, Superposition, and Stationary waves. Each one has a worked solution and a mark scheme showing where the marks go.