Answer: f=2 Hz, lambda=2 m.
- A f=2 Hz, lambda=2 m
- B f=4 Hz, lambda=4 m
- C f=2 Hz, lambda=pi m
- D f=4 Hz, lambda=2 m
Correct answer: A. f=2 Hz, lambda=2 m
Explanation: y = A sin(omega*t - kx). omega = 4*pi so f = omega/(2*pi) = 2 Hz. k = pi so lambda = 2*pi/k = 2 m.
A standing wave forms from two identical waves travelling in opposite directions and interfering; nodes (always zero displacement) and antinodes (maximum displacement) stay fixed in place, unlike a travelling wave where the whole pattern moves.
Concept context
Wave types, superposition, standing waves, Doppler effect, and sound intensity.